Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Gaulish
Maponos
→
Irish
mac
(mention)
→
Primitive Irish
ᚋᚐᚊᚔ
(mention)
→
Old Irish
macc
(mention)