Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*aleti
→
English
Alaunus
(derived)
→
Breton
aotrou
(mention)
→
Welsh
athro
(mention)
→
Irish
altra
(mention)
→
Old Irish
ailid
(inherited)