Proto-Celtic *makʷos

→ Breton mab (inherited)

→ Gaulish mapos (inherited)

→ Welsh mab (inherited)

→ Irish mac (mention)

→ Scottish Gaelic mac (mention)

→ Manx mac (mention)

→ Cornish mab (inherited)

→ Middle Irish mac (mention)

→ Primitive Irish ᚋᚐᚊᚔ (mention)

→ Old Irish macc (mention)

→ Pictish ᚋᚐᚊᚊᚑ (cognate)

→ Pictish ᚋᚐᚊᚊᚑ (link)