Old Irish raithnech

← Proto-Celtic *ɸratinākā (inherited)

← Proto-Celtic *ɸratis (derived)

← Welsh rhedyn (cognate)

← Greek φτέρη (cognate)

← Proto-Indo-European *p(t)erH- (inherited)

← Lithuanian papártis (cognate)

← Middle Irish raith (cognate)

→ Welsh rhedyn (cognate)

→ Irish raithneach (inherited)

→ Scottish Gaelic raineach (inherited)

→ Manx rhennagh (inherited)