| 303 | SALISBURY | Headington, Oxford | 1700-1850 | |||||
| 028 | SALMON | Ladock | 1700+ | |||||
| 205 | SAMPSON | Thanet, Kent | All | |||||
| 454 | SAMPSON | Sancreed | All | |||||
| 730 | SANDERCOCK (George) | Cornwall | c1800s | |||||
| 730 | SANDERCOCK (Richard) | Cornwall | c1830s | |||||
| 730 | SANDERCOCK + var. | Cornwall | All | |||||
| 378 | SANDO | Kenwyn | c1700s | |||||
| 071 | SANDOE | Kenwyn | c1700s | |||||
| 161 | SANDOE + var | All | 1600+ | |||||
| 028 | SAUNDRY | St. Ervan | 1680+ | |||||
| 367 | SCOBLE | Kea / Kenwyn | 17-19C | |||||
| 205 | SCOTT | Castelton, Scotland | All | |||||
| 605 | SEARLE + var. | Cornwall | All | |||||
| 205 | SEARS | Burnham | All | |||||
| 205 | SEERS | Burnham / Bray | All | |||||
| 205 | SELBY | Potton | c1600 | |||||
| 195 | SHAW | Oldbury, Worcester | pre1872 | |||||
| 028 | SHEER | Altarnun | 1650+ | |||||
| 071 | SHOLL | Camborne | 1700-1800s | |||||
| 710 | SHORT | St. Gennys | c1700s | |||||
| 453 | SKELL(E)Y | Millbrook | 1850+ | |||||
| 453 | SKELL(E)Y | Whitchurch, Devon | Any | |||||
| 367 | SKINNER | St. Agnes | 17-19C | |||||
| 605 | SLADE | Cornwall | All | |||||
| 399 | SLEEMAN + var. | Anywhere | All | |||||
| 205 | SMITH | High Wycombe | c1770 | |||||
| 205 | SMITH | Weybridge, Surrey | 1780+ | |||||
| 349 | SMITH | Polbathic / St. Germans | 1700-1800s | |||||
| 349 | SMITH | Plymouth / Devonport | 1800-1900s | |||||
| 028 | SMITH (Elizabeth) | St. Wenn | 1700+ | |||||
| 373 | SMITH (Joseph) | Aston | 1800 | |||||
| 303 | SNOW | Headington, Oxford | 1700-1850 | |||||
| 269 | SOADY | Pelynt / Tywardreath | c1800s | |||||
| 720 | SOADY | Looe / Talland | c1800 | |||||
| 510 | SOBEY | Falmouth | 1750+ | |||||
| 666 | SOLOMON | St. Columb Minor | 18C | |||||
| 499 | SPENCER | Launceston | pre1870 | |||||
| 605 | SPRY | Cornwall | All | |||||
| 205 | SQUIRE | Edinburgh | 1618+ | |||||
| 570 | STEAR | Cornwall | 1800+ | |||||
| 570 | STEER | Helston | 1800+ | |||||
| 737 | STAPLETON + var. | Manaccan/St. Anthony/Illogan | All | |||||
| 445 | STEPHENS | Crantock | 1740-1760 | |||||
| 445 | STEPHENS | Perranzabuloe | All | |||||
| 445 | STEPHENS | Roche | 1700-1750 | |||||
| 583 | STEPHENS | Crantock | 1500-2000 | |||||
| 583 | STEPHENS | St. Columb Minor | 1675-2000 | |||||
| 583 | STEPHENS | Wisconsin, USA | 1860-2000 | |||||
| 583 | STEPHENS | Newquay | 1850-2000 | |||||
| 583 | STEPHENS | Ladock | 1900-2000 | |||||
| 583 | STEPHENS | Saskatchewan, Canada | 1875-2000 | |||||
| 583 | STEPHENS | Cubert | 1800-1950 | |||||
| 583 | STEPHENS | Perranzabuloe | 1875-1950 | |||||
| 677 | STEPHENS | Jersey, Channel Islands | 1870+ | |||||
| 677 | STEPHENS | St. Columb Minor | 1740+ | |||||
| 695 | STEPHENS | St. Agnes | 18C | |||||
| 695 | STEPHENS | St. Teath | 1818-1845 | |||||
| 695 | STEPHENS | Liskeard | 1845-1900 | |||||
| 626 | STEPHENS (George) | St. Buryan | c1730 | |||||
| 205 | STEVENS | Hughendon | 1500+ | |||||
| 453 | STEVENS (Elizabeth) | Devonport, Devon | c1816 | |||||
| 373 | STEVENS | Landewednack | c1800s | |||||
| 373 | STEVENS | St. Ives | c1800s | |||||
| 321 | STILL (Anne) | Camberwell | 1830-1900 | |||||
| 551 | STINTON | Eton, Buckinghamshire | c19C | |||||
| 551 | STINTON | Egham, Surrey | c1800 | |||||
| 551 | STINTON | London | pre1800 | |||||
| 499 | STOCKER | Pentewan | 1840-1881 | |||||
| 071 | STOWE | Tywardreath | c1800s | |||||
| 028 | STRONGMAN | St. Breock | 1700+ | |||||
| 661 | STROUT | St. Teath | c1800s | |||||
| 205 | STUART | Edinburgh | 1600+ | |||||
| 205 | SUTHERLAND | Thurso, Scotland | c1750 | |||||
| 205 | SWABEY | Buckinghamshire | All | |||||
| 205 | SWABEY | Bedfordshire | All | |||||
| 205 | SWISCO | Northill, Bedfordshire | 1600+ | |||||
| 051 | SYMONDS | Norfolk | c1750+ | |||||
| 445 | SYMONS | St. Gluvias | pre1785 | |||||
| 570 | SYMONS (James) | St. Ewe / St. Austell | 1800+ | |||||