Old Irish cruth

← Proto-Celtic *kʷritus (inherited)

← Welsh pryd (cognate)

← Proto-Indo-European *kʷer- (root)

← Proto-Indo-European *[[kʷer-]] (derived)

→ Welsh prydydd (cognate)

→ Irish cruth (inherited)

→ Scottish Gaelic cruth (inherited)

→ Manx croo (inherited)

→ Old Irish dochrud (affix)