Lark /lark/ [1 syll.] as a girls' name (also used as boys' name Lark) is of Middle English origin. Nature name: a type of playful, lighthearted songbird.ark /lark/ [1 syll.] as a girls' name (also used as boys' name Lark) is of Middle English origin. Nature name: a type of playful, lighthearted songbird.