Proto-Celtic *makkʷos

→ Irish mac (inherited)

→ Scottish Gaelic mac (inherited)

→ Manx mac (inherited)

→ Middle Irish mac (inherited)

→ Primitive Irish ᚋᚐᚊᚔ (inherited)

→ Old Irish macc (inherited)

→ Pictish ᚋᚐᚊᚊᚑ (link)