Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
gwael
←
Breton
gail
(cognate)
←
Gaulish
Vailo
(cognate)
←
Proto-Celtic
*waylos
(inherited)
→
Welsh
gwaelu
(mention)
→
Welsh
gwaeledd
(affix)