←
Proto-Celtic *kom (inherited)
←
Proto-Celtic *kʷos (inherited)
←
English gain- (cognate)
←
Proto-Indo-European *ḱóm (inherited)
←
Proto-Slavic *kъ(n) (cognate)
→
Scottish Gaelic gun (inherited)
→
Scottish Gaelic gu (inherited)
→
Middle Irish co (inherited)
→
Old Irish nícon (mention)