Welsh asgwrn

← Breton askorn (cognate)

← Proto-Celtic *astkornu (inherited)

← Proto-Celtic *ast- (mention)

← Proto-Celtic *kornu (mention)

← Welsh ais (mention)

← English horn (cognate)

← Proto-Indo-European *ḱr̥h₂nom (inherited)

← Cornish - (cognate)

← Latin cornū (cognate)

← Old Irish corn (cognate)

← Middle Welsh [[ascurn]], [[ascwrn]] (inherited)

← Middle Welsh cyrn (cognate)

→ Breton askorn (cognate)

→ Welsh ais (mention)

→ Welsh asen (mention)