Lock

As an English, German and Dutch surname, from the noun lock.

Also as an English surname, from Middle English loke, itself from Old English loca (“enclosure”) or *Loca (“Loki”) (theonym of the latter).

Also as an English surname, from Middle English locke, from Old English locc (“lock of hair”).

Also as a German surname, Americanized from Loch.

a Cantonese form of 樂 / 乐, see Le.

a Cantonese form of 陸 / 陆, 鹿 (lù), 逯 (lù), and 禄 (lù), see Lu.

a Cantonese form of 駱 / 骆 (luò), see Luo.