The following information was gleaned by Eardley Bryan from Internet on 1/2 February 1996.  The URL is "http://www.dsc.hull.ac.uk./cgi-bin/gedidex/n=royal?Scotland".  The reason for this search was an entry in the Forbes family tree drawn up by Alfred Monroy Montanaro in 1855.  It states that Sir Alexander Forbes married Elizabeth Douglas, daughter of George, Earl of Angus and G daughter of Robert III.

MorMacErc, Fergus, of Dalriada, King of Scots
Acceded: CIR 490
Died: 501, killed
Child 1: macFergusso, Domangart of Dalriada 'Reti', King of Scots

macFergusso, Domangart of Dalriada 'Reti', King of Scots
Died: CIR 506
Father: MorMacErc, Fergus, of Dalriada, King of Scots
Child 1: macDomangairt, Gabhran of Argyll, King of Scots

macDomangairt, Gabhran of Argyll, King of Scots
Died: CIR 559
Father:macFergusso, Domangart of Dalriada 'Reti', King of Scots
Married or Associated with, Ingenach (Lleian)
Child 1: macGabhran, Aidan of Argyll, King of Scots

Ingenach (Lleian)
Father: Brychan of Manau, Prince
Mother: Princess
Married or Associated with macDomangairt, Gabhran of Argyll, King of Scots
Child 1: macGabhran, Aidan of Argyll, King of Scots

macGabhran, Aidan of Argyll, King of Scots
Acceded: CIR 574
Died: CIR 608
Notes:consecrated by his cousin St. Columba.
Father:macDomangairt, Gabhran of Argyll, King of Scots
Mother:  Ingenach (Lleian)
Child 1: macAidan, Eochaidh Buidhe of Argyll, King of Scots

macAidan, Eochaidh Buidhe of Argyll, King of Scots
Died: CIR 629
Father: macGabhran, Aidan of Argyll, King of Scots
Child 1: Brecc, Domnall, the Speckled of Argyll, King of Scots

Brecc, Domnall, the Speckled of Argyll, King of Scots
Died: CIR 643, battle
Father: macAidan, Eochaid _Buidhe of Argyll, King of Scots
Child 1: macDomnaill, Domangart II of Argyll, King of Scots

macDomnaill, Domangart II of Argyll, King of Scots
Died: CIR 673, killed
Father: Brecc, Domnall, the Speckled of Argyll, King of Scots
Child 1: Eochaidh_Crook Nose of Argyll, Kings of Scots

Eochaidh Crook Nose of Argyll, Kings of Scots
Died: 697, killed
Father: macDomnaill, Domangart II of Argyll, King of Scots
Child 1: macEchdach, Eochaidh III of Argyll, King of Scots

macEchdach, Eochaidh III of Argyll, King of Scots
Died: 733
Father: , Eochaidh Crook Nose of Argyll, Kings of Scots
Child 1: Find, Aedh, The white of Argyll, King of Scots

Aedh, The white of Argyll, King of Scots
Died: 778
Father: macEchdach, Eochaidh III of Argyll, King of Scots
Child 1: Argyll, Eochaid 'The Venemous' of, King of Scots

Eochaid 'The Venemous' of, King of Scots
Acceded: 780
Father: Find, Aedh, The white of Argyll, King of Scots
Married or Associated with  Unuisticc of Picts, Princess Royal
Child 1:  Alpin of Kintyre, King of Kintyre

Princess of Picts
Notes:Matrilinear Pictish Princesses Royal of Fortrinn (Verturiones) from at least
Ca 250, whose brothers reigned as High Kings of Alba (Albany) by 5th Century,
probably in pagan times with throne name of Bruide.
Child 1:  Unuisticc of Picts, Princess Royal
Child 2: , Constantine of Picts, King of Picts
Child 3:  Unuist of Picts, King of Picts

Unuisticc of Picts, Princess Royal
Mother:  Princess of Picts
Married or Associated with Argyll, Eochaid 'The Venemous' of, King of Scots
Child 1:  Alpin of Kintyre, King of Kintyre

Alpin of Kintyre, King of Kintyre
Died: 834
Father: Argyll, Eochaid 'The Venemous' of, King of Scots
Mother:  Unuisticc of Picts, Princess Royal
Child 1: MacAlpin, Kenneth I of Scotland, King of Scotland
Child 2:  Donald I of Scotland, King of Scotland

MacAlpin, Kenneth I of Scotland, King of Scotland
Acceded: 839
Died: 859
Notes:Burke calls him Kenneth II.  Kings of Picts; Alba.
Father: Alpin of Kintyre, King of Kintyre
Child 1:  Constantine II of Alba, King of Scotland
Child 2:  Aedh (Ethus) Swift Foot of Scotland, King of Scotland
Child 3: MacAlpin, Eochaid

Constantine II of Alba, King of Scotland
Acceded: 863
Died: 877, beheaded
Notes:King of the Picts & Scots. King of Alba.
Father: MacAlpin, Kenneth I of Scotland, King of Scotland
Child 1: Donald II of Alba, King of Alba

 Donald II of Alba, King of Alba
Acceded: 889
Died: 900, battle
Interred: Iona
Father: , Constantine II of Alba, King of Scotland
Child 1:  Malcolm I of Alba, King of Scotland

Malcolm I of Alba, King of Scotland
Acceded: 943
Died: 954, battle
Notes:King of Alba.
Father:  Donald II of Alba, King of Alba
Child 1:  Dubh of Scotland, King of Scotland
Child 2:  Kenneth II of Alba, King of Alba

Kenneth II of Alba, King of Alba
Acceded: 971
Died: 995, killed
Father:  Malcolm I of Alba, King of Scotland
Child 1:  Malcolm II of Alba, King of Alba

Malcolm II of Alba, King of Alba
Acceded: 1005
Died: 1034, killed
Notes:conquered Lothian 1018.
Father:  Kenneth_II of Alba, King of Alba
Child 1:  Dovada
Child 2:  Bethoc (Beatrix), Heiress of Scone
Child 3:  Daughter

Crinan (Grimus), Mormaer of Atholl
Died: 1045, battle
Notes:lay abott of Dunkeld
Father:
Married or Associated with , Bethoc (Beatrix), Heiress of Scone
Child 1:  Duncan I of Scotland, King of Scotland
Child 2:  Maldred

Bethoc (Beatrix), Heiress of Scone
Notes:See note under Devada her sister regarding confusion.
Father:  Malcolm II of Alba, King of Alba
Married or Associated with , Crinan (Grimus), Mormaer of Atholl
Child 1:  Duncan I of Scotland, King of Scotland
Child 2:  Maldred
Duncan I of Scotland, King of Scotland
Acceded: 1034
Died: 1040, killed
Father: Crinan (Grimus), Mormaer of Atholl
Mother: Bethoc (Beatrix), Heiress of Scone
Married or Associated with, Aelflaed (Sybil) of Northumbria
Child 1: Malcolm III Caennmor of Scotland, King of Scotland
Child 2: Donald III Bane of Scotland, King of Scotland
Child 3: Margaret
Child 4: Maelmuir of Atholl, Earl of Atholl

Aelflaed (Sybil) of Northumbria
Father: Ealred (Siward) of Northumberland, Earl of Northumberland
Mother: AEfflaed of Bernicia
Married or Associated with Duncan I of Scotland, King of Scotland
Child 1: Malcolm III Caennmor of Scotland, King of Scotland
Child 2: Donald III Bane of Scotland, King of Scotland
Child 3: Margaret
Child 4: Maelmuir of Atholl, Earl of Atholl

King of Scotland, Malcolm III Caennmor of Scotland, King of Scotland
Acceded: 1058
Died: 13 NOV 1098, Alnwick Castle
Notes:Some say died 1093. Slew Macbeth 1057.
Father: Duncan I of Scotland, King of Scotland
Mother: Aelflaed_(Sybil) of Northumbria
Married: ABT 1066   to Finnsdottir, Ingibiorg Earls' Mother
Child 1: Duncan II of Scotland, King of Scotland
Child 2:  Malcolm
Child 3:  Donald
Married or Associated with Atheling, Margaret (St.) the Exile
Child 4: Edward
Child 5: Edmund I of Scotland, King of Scotland
Child 6: Ethelred
Child 7: Edgar of Scotland, King of Scotland, b. ABT 1074
Child 8: Alexander I the Fierce of Scotland, King of Scotland, b. 1078
Child 9: Matilda (Edith) of Scotland, b. 1079/80
Child 10: David I the Saint of Scotland, King of Scotland, b. ABT 1084
Child 11: Mary of Scotland

Atheling, Margaret (St.) the Exile
Born: 1045
Died: 1093
Notes: Canonised 1250 and her feast day is 16th November. In 1057 she arrived at the English court of Edward the Confessor. Ten years later she was in exile after William defeated Harold at the Battle of Hastings. She fled to Scotland where she was married against her wishes to King Malcolm to whom she bore six sons and two daughters. Her unlerned and boorish husband grew daily more graceful and Christian under the queen's graceful influence.
Father: Atheling, Edward the Outlaw, b. ABT 1016
Mother: Agatha
Married or Associated with  Malcolm III Caennmor of Scotland, King of Scotland
Child 1: Edward
Child 2: Edmund I of Scotland, King of Scotland
Child 3: Ethelred
Child 4: Edgar of Scotland, King of Scotland, b. ABT 1074
Child 5: Alexander I the Fierce of Scotland, King of Scotland, b. 1078
Child 6: Matilda (Edith) of Scotland, b. 1079/80
Child 7: David I the Saint of Scotland, King of Scotland, b. ABT 1084
Child 8: Mary of Scotland

 David I the Saint of Scotland, King of Scotland
Born: ABT 1084
Acceded: 1124
Died: 24 MAY 1153, Carlisle
Interred: Dunfermline,Scotland
Notes:Earl of Huntingdon. United Alba with Strathclyde. Earl of Northampton. His feast day is 24th May.
Father: Malcolm III Caennmor of Scotland, King of Scotland
Mother: Atheling, Margaret (St.) the Exile, b. 1045
Married: 1113   to Matilda of Northumberland
Child 1: Malcolm
Child 2: Henry of Huntingdon, Earl of Huntingdon, b. ABT 1114
Child 3: Claricia
Child 4: Hodierna

Matilda of Northumberland
Died: 1131
Interred: Scone
Father: Waltheof of Huntingdon, Earl of Huntingdon 1
Mother: Judith of Normandy
Married: 1090   to de St. Liz, Simon, of Northampton, Earl of Northampton
Child 1: de St. Liz, Simon, of Huntington, Earl of Huntington, b. AFT 1103
Child 2: Waldef of Melrose, Abbot of Melrose
Married: 1113   to David I the Saint of Scotland, King of Scotland
Child 3: Malcolm
Child 4: Henry of Huntingdon, Earl of Huntingdon, b. ABT 1114
Child 5: Claricia
Child 6: Hodierna

Henry of Huntingdon, Earl of Huntingdon
Born: ABT 1114
Acceded: 1136
Died: 12 JUN 1152
Interred: Kelso
Notes:and Earl of Northumberland
Father: David I the Saint of Scotland, King of Scotland, b. ABT 1084
Mother: Matilda of Northumberland
Married or Associated with de Warren, Adelaide
Child 1: Malcolm IV the Maiden of Scotland, King of Scotland, b. 20 Mar 1141/42
Child 2: William I the Lion of Scotland, King of Scotland, b. 1143
Child 3: Margaret, Countess of Hereford
Child 4: Ada
Child 5: David of Huntingdon, Earl of Huntingdon
Child 6: Maud

de Warren, Adelaide
Died: 1178
Father: de Warenne, William, Earl of Warren & Surrey 2
Mother: de Crepi, Elizabeth (Isabel)of Vermandois
Married or Associated with  Henry of Huntingdon, Earl of Huntingdon
Child 1: Malcolm IV the Maiden of Scotland, King of Scotland, b. 20 Mar 1141/42
Child 2: William I the Lion of Scotland, King of Scotland, b. 1143
Child 3: Margaret, Countess of Hereford
Child 4: Ada
Child 5: David of Huntingdon, Earl of Huntingdon
Child 6: Maud

David of Huntingdon, Earl of Huntingdon
Acceded: 1185
Died: 17 JUN 1219, Yardley, Northants
Interred: Sawtrey Abbey, Hunts.
Notes:and Earl of Northumberland, Earl of Lennox
Father: Henry of Huntingdon, Earl of Huntingdon, b. ABT 1114
Mother: de Warren, Adelaide
Married: 26 AUG 1190   to de Keveliock, Matilda of Chester
Child 1: Robert
Child 2: Margaret
Child 3: Isobella
Child 4: Scot, John of Chester le, Earl of Chester, b. 1207
Child 5: Maud
Child 6: Ada
Child 7: Henry

Matilda of Chester
Died: 6 JAN 1233
Father: de Keveliock, Hugh, Earl of Chester 6
Mother: D'Evreux, Bertrade
Married: 26 AUG 1190   to David of Huntingdon, Earl of Huntingdon
Child 1: Robert
Child 2: Margaret
Child 3: Isobella
Child 4: Scot, John of Chester le, Earl of Chester, b. 1207
Child 5: Maud
Child 6: Ada
Child 7: Henry

de Bruce, Robert, of Annandale, Lord Annandale
Died: 1245
Married or Associated with Isobella
Child 1: Bruce, Robert, Lord of Annandale

Isobella
Died: 1251
Father: David of Huntingdon, Earl of Huntingdon
Mother: de Keveliock, Matilda of Chester
Married or Associated with de Bruce, Robert, of Annandale, Lord Annandale
Child 1: Bruce, Robert, Lord of Annandale

Bruce, Robert, Lord of Annandale
Died: 1295
Father: de Bruce, Robert, of Annandale, Lord Annandale
Mother: Isobella
Married: 1240   to de Clare, Isobel
Married or Associated with de Ireby, Christina
Child 1: Bruce, Robert, Earl of Carrick
Child 2: Bruce, Christina

 de Ireby, Christina
Father: de Ireby, William, Sir
Married or Associated with Bruce, Robert, Lord of Annandale
Child 1: Bruce, Robert, Earl of Carrick
Child 2: Bruce, Christina

Bruce, Robert, Earl of Carrick
Died: 1304
Father: Bruce, Robert, Lord of Annandale
Mother: de Ireby, Christina
Married or Associated with Marjorie of Carrick, Countess of Carrick
Child 1: Mary
Child 2: Bruce, Robert I, of Scotland, King of Scotland, b. 1274
Child 3: Edward, Earl of Carrick
Child 4: Thomas
Child 5: Alexander
Child 6: Nigel
Child 7: Isabel, b. 1358
Child 8: Christina
Child 9: Daughters, One, Son and One
Child 10: Bruce, Maud
Married or Associated with Eleanor

Marjorie of Carrick, Countess of Carrick
Died: BEF 1292
Father: Neil of Carrick, Earl of Carrick II
Mother: Stewart, Margaret
Married or Associated with de Kilconcath, Adam
Married or Associated with Bruce, Robert, Earl of Carrick
Child 1: Mary
Child 2: Bruce, Robert I, of Scotland, King of Scotland, b. 1274
Child 3: Edward, Earl of Carrick
Child 4: Thomas
Child 5: Alexander
Child 6: Nigel
Child 7: Isabel, b. 1358
Child 8: Christina
Child 9: Daughters, One, Son and One
Child 10: Bruce, Maud

Bruce, Robert I, of Scotland, King of Scotland
Born: 1274
Acceded: 1306
Died: 1329, Cardoss Castle,Firth of Clyde,Scotland
Notes: victor of Bannockburn 1314. Scotlands liberator & epic hero.
Father: Bruce, Robert, Earl of Carrick
Mother: Marjorie of Carrick, Countess of Carrick
Married: 1296   to Isobel of Mar
Child 1: Bruce, Marjorie, Princess
Married: 1302   to de Burgh, Elizabeth
Child 2: Bruce, Margaret
Child 3: Bruce, Matilda
Child 4: Bruce, David II, of Scotland, King of Scotland
Child 5: Bruce, John
Child 6: Bruce, Elizabeth

Isobel of Mar
Father: Donald of Mar, Earl of Mar 6
Married: 1296   to Bruce, Robert I, of Scotland, King of Scotland
Child 1: Bruce, Marjorie, Princess

Bruce, Marjorie, Princess
Died: 1316
Father: Bruce, Robert I, of Scotland, King of Scotland, b. 1274
Mother: Isobel of Mar
Married: 1315   to Stewart, Walter, HighSteward of Scotland 6
Child 1: Stuart, Robert II of Scotland, King of Scotland, b. 2 MAR 1316

Stewart, James, High Steward of Scotland
Born: 1243
Acceded: 1283
Died: 16 JUL 1309
Notes:In 1286 chosen as one of six Regents of Scotland.
Father: Stewart, Alexander, High Steward of Scotland
Mother: Macrory, Jean
Married or Associated with Cecilia
Child 1: Stewart, Andrew
Child 2: Stewart, Walter, HighSteward of Scotland 6, b. 1293
Child 3: Stewart, John, Sir
Child 4: Stewart, James of Durrisdeer, Sir
Child 5: Stewart, Egidia

Stewart, Walter, HighSteward of Scotland 6
Born: 1293
Died: 9 APR 1326
Notes:     Burke say he was 3rd Steward
Father: Stewart, James, High Steward of Scotland5, b. 1243
Mother: , Cecilia
Married to Erskine, Alice
Child 1: Stewart, Jean
Married 1315 to Bruce, Marjorie, Princess
Child 2: Stuart, Robert II of Scotland, King of Scotland, b. 2 MAR 1316
Married to Graham, Isabel
Child 3: Stewart, John of Ralston, Sir
Child 4: Stewart, Egidia
Child 5: Stuart, Andrew, Sir

Stuart, Robert II of Scotland, King of Scotland
Born: 2 MAR 1316, Paisley, Renfrewshire, Scotland
Acceded: 26 MAR 1371, Scone Abbey, Perthshire
Died: 19 APR 1390, Dundonald Castle, Ayrshire
Interred: Scone Abbey, Perthshire
Notes:   Was in command of the second division of the Scotch Army at Halidon Hill, and was one of the few who escaped the carnage of that disastrous day.  See Europäisch Stammtafeln Bund II tafel 69.  There is some confusion over which daughter is which and who are their mothers which still needs some clarification.
Father: Stewart, Walter, HighSteward of Scotland 6, b. 1293
Mother: Bruce, Marjorie, Princess, b. CIR 1297
Married ABT 1347 to Mure, Elizabeth of Rowallan
Child 1: Stuart, Margaret
Child 2: Stuart, Robert III (John) of Scotland, King of Scotland, b. 1337
Child 3: Stuart, Walter, Earl of Fife
Child 4: Stuart, Robert of Fife, Duke of Albany, b. ABT 1339
Child 5: Stuart, Alexander "the Wolf" of Badenach, Earl of Buchan 1, b. CIR 1343
Child 6: Stuart, Marjory
Child 7: Stuart, Jean, Lady
Child 8: Stuart, Isabella
Child 9: Stuart, Katherine
Child 10: Stuart, Elizabeth
Married AFT 2 MAY 1355 to Leslie, Euphemia of Ross, Countess of Moray
Child 11: Stuart, David of Caithness, Earl of Caithness, b. ABT 1356
Child 12: Stuart, Walter of Atholl, Earl of Atholl, b. CIR 1360
Child 13: Stuart, Margaret
Child 14: Stuart, Elizabeth (Catherine)
Child 15: Stuart, Egidia
Associated with Leitch, Moira
Child 16: Stewart, John of Bute, Sheriff of Bute
Associated with Cardny, Marion
Child 17: Stewart, Alexander, Canon of Glasgow
Child 18: Stuart, John of Arntullie
Child 19: Stuart, James of Kinfauns
Child 20: Stuart, Walter
Child 21: Stewart, John of Burley, Lord of Burley
Child 22: Stewart, John of Cairdney, Sir
Child 23: Stuart, Alexander of Inverlunan, Sir
Child 24: Stuart, Thomas, Dean of Dunkeld

Mure, Elizabeth of Rowallan (Grandmother of Stuart, Mary)
Died: ABT    1355
Father: Mure, Adam of Rowallan, Sir
Married or Associated with Stuart, Robert II of Scotland, King of Scotland
Child 1: Stuart, Margaret
Child 2: Stuart, Robert III (John) of Scotland, King of Scotland
Child 3: Stuart, Walter
Child 4: Stuart, Robert of Fife, Earl of Fife, b. ABT 1339
Child 5: Stuart, Alexander;the Wolf; of Badenach, Earl of Buchan
Child 6: Stuart, Marjory
Child 7: Jean, Lady
Child 8: Elizabeth
Child 9: Catherine
Child 10: Egidia

Stuart, Robert III (John) of Scotland, King of Scotland
Born: 1337
Acceded: 14 AUG 1390, Scone Abbey, Perthshire
Died: 4 APR 1406, Rothsay Castle
Interred: Paisley Abbey, Renfrewshire
Notes:    Changed his name from John to Robert on ascending to the throne. Reigned but too injured by kick from horse to rule.Weir says died at Dundonald Castle, Ayrshire.
Father: Stuart, Robert II of Scotland, King of Scotland, b. 2 MAR 1316
Mother: Mure, Elizabeth of Rowallan
Married 1367 to Drummond, Annabella
Child 1: Stuart, Elizabeth
Child 2: Stuart, Margaret
Child 3: Stuart, David of Rothesay, Duke of Rothesay, b. 24 OCT 1378
Child 4: Stuart, Robert
Child 5: Stuart, Mary
Child 6: Stuart, Egidia
Child 7: Stuart, James I of Scotland, King of Scotland, b. DEC 1394
Child 8: Steuart, John of Blackhall and Ardgowan

Stuart, Mary
Died: ABT 1458
Interred: Strathblane Church, Scotland
Father: Stuart, Robert III (John) of Scotland, King of Scotland, b. 1337
Mother: Drummond, Annabella, b. CIR 1350
Married 1387 to Douglas, George, Earl of Angus 1st/13th
Child 1: Douglas, William, Earl of Angus 2nd, b. ABT 1398
Child 2: Douglas, Elizabeth
Married 1405 to Kennedy, James of Dunure, Sir
Child 3: Kennedy, James, Bishop of Dunkeld, b. 1405
Child 4: Kennedy, Gilbert, b. ABT 1406
Child 5: Kennedy, John, Sir
Married JUL 1409 to Cunningham, William, Sir
Married 13 NOV 1413 to Graham, William of Kincardine, Lord Graham 1st
Child 6: Graham, Patrick, Archbishop of St Andrews
Child 7: Graham, Robert of Strathcarron
Child 8: son, three
Married 1425 to Edmonstone, William of Duntreath

Douglas, William of, Earl of Douglas 1st
Associated with Stewart, Margaret, Countess of Angus
Child 1: Douglas, George, Earl of Angus 1st/13th

Douglas, George, Earl of Angus 1st/13th
Acceded: 23 MAR 1418
Notes:     It is said he died 1402, but that can't be right.
Father: Douglas, William of, Earl of Douglas 1st
Mother: Stewart, Margaret, Countess of Angus
Married 1387 to Stuart, Mary
Child 1: Douglas, William, Earl of Angus 2nd, b. ABT 1398
Child 2: Douglas, Elizabeth

Douglas, Elizabeth
Father: Douglas, George, Earl of Angus 1st/13th
Mother: Stuart, Mary
Married to Forbes, Alexander, Lord Forbes 1st
Married to Hay, David of Yester, Sir
Child 1: Hay, John, Lord Hay 1st