Atkin

Atkin is a short form of Adam that originated in Medieval England. It's now obsolete, but traces remain in surnames such as Atkins and Atkinson.

Medieval nicknames that followed a similar formula include Jenkin (John), Perkin (Peter), and Wilkin (William). The only one that has shown any signs of revival is Larkin, short for Lawrence, which is gaining in popularity particularly among baby girls.

Pronounced AT-kin.