A form of Colman is the name Colmana.
See also the related form, the French Colombe.
Colman is not commonly used as a baby girl name. It is not in the top 1000 names.
A baby name that sounds like Colman is the name Colmyan.
† English pronunciation for Colman: K as in "key (K.IY)" ; OW as in "oak (OW.K)" ; L as in "lay (L.EY)" ; M as in "me (M.IY)" ; AH as in "mud (M.AH.D)" ; N as in "knee (N.IY)"