Lock

There are three possibilities:

• From the words Old English loc (“lock”).
• From Middle English loke, itself from loca (“enclosure”) or *Loca (“Loki”) (theonym of the latter).
• From Middle English locke, from locc (“lock of hair”).

Lock

1. A surname​.

• KLOC

From Middle Low German lok, from Old Saxon *lok, from Proto-Germanic *luką. Cognate with English lock.

Lock n (plural Locken)

1. hole
2. opening