!Ancestral Roots of Sixty Colonists Who Came to New England between 1623 and 1650, Sixth Edition by Frederick Lewis Weis Genealogical Publishing Co., Baltimore 1988 line 28-34; The Plantagent Ancestry by W.H.Turton DSO Genealogical Publishing Co. Baltimore 1984 pp 72; Royal Ancestors of Some American Families by Michel Call SLC 1989 chart 11205; Some sources from Paula Evans 1992;

He led the way into the Castle at Nottingham, the night Mortimer was captured. He was young then, and continued to rise in the King`s service.

His castle domicile was Wark Castle, built by the Normans, on the Scottish border. He had been captured by the French and held for ransom. As he was a close friend of King Edward III, it was paid and he was released. During his captivity his wife held Castle Wark, and was besieged by the Scots, until the King came to the rescue. He died after being injured at a joust held by the King.

• 1 William Montacute = Elizabeth Mohun
  
  • 1 William Montacute = Elizabeth Fitzalan
    
• 2 John Montacute = Margaret Monthermer
  
  • 1 John Montacute 3rd Earl Of Salisbury = Maud Francis
    
    • 1 Thomas Montacute Earl Of Sarum = Alianor
      
    • 2 Richard Montacute
      
    • 3 Anne Montacute = Richard Hankford Knt.
      
    • 3 Anne Montacute = Sir John Lewis Knt.
      
    • 4 Margaret Montacute
      
    • 5 Elizabeth Montacute
      
• 3 Phillipa De Montacute = Roger Mortimer
  
  • 1 Edmund Mortimer Earl Of March = Lady Philippa Plantagenet
    
    • 1 Roger Mortimer Earl Of March = Eleanora Holand
      
    • 2 Phillipa Mortimer = John Hastings 5th Lord Hastings
      
    • 3 Elizabeth Mortimer = Henry Percy
      
    • 3 Elizabeth Mortimer = Thomas Camoys Lord Camoys
      
  • 2 Beatrix Mortimer = Edward Plantagenet Of Brotherton
    
  • 2 Beatrix Mortimer = Thomas De Braose
    
• 4 Sybil Montacute
  
• 5 Elizabeth Montacute
  
• 6 Agnes Montacute