Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Old Irish macc
Gaulish mapos (cognate)
Gaulish Maponos (mention)
Proto-Celtic *makkʷos (inherited)
Proto-Celtic *makʷos (mention)
Welsh mab (cognate)
Ancient Greek μακρός (cognate)
Proto-Indo-European *meh₂ḱ- (inherited)
Latin macer (cognate)
Primitive Irish ᚋᚐᚊᚊᚔ (inherited)

English McMahon (derived)
English Micawber (derived)
Gaulish mapos (cognate)
Irish mac (inherited)
Scottish Gaelic mac (inherited)
Manx mac (inherited)
Cornish map (cognate)
Middle Irish mac (inherited)
Old Irish Cormac (mention)
Old Irish macthae (affix)
Albanian mag (cognate)