Nicknames for Cosmas
7 nicknames, sorted by where they actually get used.
Office-safe
Cos
formal
Cosm
formal
Playground-friendly
Cosmy
casual
Cosmie
casual
Coy
casual
Coie
casual
Family nicknames
Coskins
endearment
Cosmas carries 7 common short forms — Cos, Cosm, and Cosmy. The list splits into 2 office-safe picks and 4 playground-friendly options so you can match the moment.