Old Irish adgnin

← Proto-Celtic *gninuti (inherited)

← Proto-Celtic *atiuɸogni- (mention)

← Welsh adwaen (cognate)

← Proto-Indo-European *ǵneh₃- (root)

← Proto-Indo-European *ǵneh₃- (inherited)

← Cornish aswon (cognate)

← Old Irish aith (prefix)