| 706 | LADNER | St. Just in Penwith | 1600-1630 | |||||
| 028 | LAKE | Wenbury, Devon | 1700+ | |||||
| 388 | LANDER | St. Ives | pre1880 | |||||
| 092 | LANE | Gwennap | c1847 | |||||
| 303 | LANGDON | Exeter, Devon | 1700-1850 | |||||
| 303 | LANGFORD | St. Kew | 1500-1600 | |||||
| 051 | LANYON (William) | St. Buryan | pre1800s | |||||
| 445 | LANYON | St. Hilary | c1750 | |||||
| 195 | LAW | Birmingham | pre1835 | |||||
| 367 | LAWRY | Kenwyn | 18-19C | |||||
| 445 | LAWRY | Mabe | pre1825 | |||||
| 583 | LAWRY | Falmouth | 1700-1900 | |||||
| 583 | LAWRY | Mabe | 1800-1950 | |||||
| 583 | LAWRY | Budock Water | 1800-1950 | |||||
| 583 | LAWRY | Gwennap / Redruth | 1850-1950 | |||||
| 583 | LAWRY | Nancekuke | 1850-1950 | |||||
| 583 | LAWRY | Porthtowan | 1875-1950 | |||||
| 583 | LAWRY | St. Allen | 1900-1950 | |||||
| 583 | LAWRY | Perranzabuloe | 1850-1950 | |||||
| 706 | LAWRY | St. Just in Penwith | 1775+ | |||||
| 195 | LEGGO | St. Just in Penwith | pre1884 | |||||
| 150 | LEMIN | St. Hilary | All | |||||
| 010 | LEVY | Falmouth | 18-19C | |||||
| 551 | LEWARNE | St. Columb Major | 18-19C | |||||
| 551 | LEWARNE | St. Ewe | 18-19C | |||||
| 303 | LEWIS | Headington, Oxford | 1700-1900 | |||||
| 303 | LIDDICOTE | St. Columb Major | 1600-1800 | |||||
| 205 | LIMING | Lidlington, Bedfordshire | c1762 | |||||
| 551 | LIPSCOMBE | Maidenhead | 18-19C | |||||
| 551 | LIPSCOMBE | Prices Risborough | 18-19C | |||||
| 357 | LITTLEJOHNS | St. Stephens by Saltash | 1750-1825 | |||||
| 273 | LORY | St. Keverne | All | |||||
| 303 | LOUCH | Headington, Oxford | 1700-1800 | |||||
| 028 | LOWER | Warleggan | c1600s | |||||
| 205 | LYLE | Whitstone | 1600+ | |||||
| 239 | LYLE | Cornwall | pre1550 | |||||
| 524 | LYNAM | St. Kew/St. Mabyn | All | |||||