Breton eontr

← Proto-Celtic *awontro (inherited)

← Proto-Celtic *awontīr (mention)

← Welsh ewythr (cognate)

← German Awwe (mention)

← Proto-Indo-European *h₂eu-on-tēr (mention)

← Proto-Indo-European *h₂ewh₂- (derived)

← Proto-Indo-European *h₂éwh₂os (mention)

← Cornish ewnter (cognate)

← Latin avus (cognate)

← Middle Irish ó (cognate)

→ Welsh ewythr (cognate)

→ Latin avunculus (cognate)

→ Lithuanian avynas (cognate)

→ Old Irish amnair (cognate)