Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*lukoss
→
Welsh
llygod
(inherited)
→
Irish
luch
(inherited)
→
Scottish Gaelic
luch
(inherited)
→
Manx
lugh
(inherited)
→
Cornish
logos
(inherited)
→
Old Irish
luch
(inherited)