←
Old English sundor (cognate)
←
Ancient Greek ἄτερ (cognate)
←
Proto-Indo-Iranian *sanHtŕ̥ (inherited)
←
Proto-Indo-European (inherited)
←
Proto-Indo-European *senH- (mention)
←
Tocharian B snai (cognate)
→
Ancient Greek ἄτερ (cognate)
→
Old Irish sain (cognate)