Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*lēgā
→
Welsh
llwy
(inherited)
→
Irish
liach
(inherited)
→
Scottish Gaelic
liogh
(derived)
→
Cornish
lo
(inherited)
→
Old Irish
líach
(inherited)