Surnames Lobusta – Lockstead
- Lobusta (2)
- Lobygem (1)
- Lobza (1)
- Loc (4)
- Locacius (2)
- Locander (5)
- Locandro (2)
- Locano (1)
- Locanougher (1)
- Locario (2)
- Locas (1)
- Locascio (38)
- Locashio (3)
- Locaste (2)
- Locasto (3)
- Locastro (3)
- Locatelli (7)
- Locati (1)
- Loccarini (1)
- Loccisano (1)
- Loce (1)
- Locence (1)
- Locey (7)
- Loch (21)
- Locha (2)
- Lochabay (23)
- Lochaby (2)
- Lochala (5)
- Lochamy (1)
- Lochan (6)
- Lochansingh (2)
- Lochard (2)
- Lochart (2)
- Lochary (2)
- Lochau (1)
- Lochausen (5)
- Lochbaum (5)
- Lochbrunner (1)
- Loche (11)
- Lochead (1)
- Locheed (1)
- Locher (23)
- Lochert (3)
- Lochet (1)
- Lochhead (12)
- Lochiano (3)
- Lochiel (3)
- Lochinski (1)
- Lochirco (1)
- Lochli (1)
- Lochman (4)
- Lochmann (5)
- Lochmatov (1)
- Lochmiller (1)
- Lochner (19)
- Locho (1)
- Lochore (1)
- Lochotzki (1)
- Lochridge (66)
- Lochridge-Fletcher (1)
- Lochrie (6)
- Lochte (33)
- Locicero (13)
- Lock (198)
- Lock Campbell (1)
- Lockabey (1)
- Lockaby (72)
- Lockamy (24)
- Lockard (108)
- Lockart (10)
- Lockartt (1)
- Lockas (1)
- Locke (1,142)
- Lockeby (26)
- Lockee (1)
- Lockeley (1)
- Lockeman (1)
- Lockemy (1)
- Locken (5)
- Lockenour (2)
- Locker (90)
- Lockerbie (4)
- Lockerby (2)
- Lockerd (4)
- Lockered (1)
- Lockerman (10)
- Lockert (5)
- Locket (4)
- Lockett (705)
- Lockette (11)
- Lockey (57)
- Lockeyear (1)
- Lockhard (2)
- Lockhardt (4)
- Lockhart (1,024)
- Lockhead (6)
- Lockheart (6)
- Lockhoof (1)
- Lockhorn (1)
- Lockhort (1)
- Lockie (5)
- Lockin (1)
- Locking (4)
- Lockingen (3)
- Lockinger (1)
- Lockings (4)
- Lockington (2)
- Lockinour (1)
- Lockins (2)
- Locklair (6)
- Locklar (29)
- Locklear (184)
- Locklear-Ratley (1)
- Lockledge (1)
- Lockler (38)
- Lockless (1)
- Lockleur (1)
- Lockley (44)
- Locklien (1)
- Locklier (6)
- Locklin (124)
- Lockling (1)
- Lockman (31)
- Lockmaw (1)
- Lockmiller (11)
- Lockmondy (1)
- Lockname (1)
- Locknana (1)
- Locknane (18)
- Lockner (10)
- Lockney (2)
- Lockovich (1)
- Lockridge (238)
- Locks (38)
- Locksey (2)
- Lockshire (2)
- Locksley (1)
- Lockstead (1)