Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*ɸētu
→
English
Helvetii
(mention)
→
Irish
iath
(inherited)
→
Scottish Gaelic
iadh
(inherited)
→
Old Irish
íath
(inherited)