Old Irish cerc

← Proto-Celtic *kerkā (inherited)

← Proto-Indo-European *ḱer- (derived)

← Latin cornix (cognate)

→ English rook (cognate)

→ Assamese কইৰ (cognate)

→ Irish cearc (inherited)

→ Scottish Gaelic cearc (inherited)

→ Manx kiark (inherited)

→ Early Assamese কৈৰা (cognate)

→ Sanskrit कृकर (cognate)

→ Old Irish cercdae (affix)