I think I favor simply
Lark over
Larkin. Though
Larkin does remind me of a GP Musical "Once Upon a Mattress" in which
Lady Larkin is a character.
Please rate my "Names I would Use" list & "Backup Favorites" list. Feel free to rate some of my other lists too if you have the time.
https://www.behindthename.com/pnl/223226/138473