Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*kallī
→
Welsh
celli
(inherited)
→
Welsh
hollti
(cognate)
→
Irish
scoilt
(cognate)
→
Latin
Gallaeci
(derived)
→
Old Irish
caill
(inherited)