Middle Irish mac

← Proto-Celtic *makkʷos (inherited)

← Proto-Celtic *makʷos (mention)

← Proto-Indo-European *meh₂ḱ- (derived)

← Primitive Irish ᚋᚐᚊᚊᚔ (inherited)

← Old Irish macc (inherited)

→ Welsh macydelgi (borrowed)

→ Welsh macymwn (borrowed)