Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*omos
→
Irish
amh
(inherited)
→
Scottish Gaelic
amh
(inherited)
→
Manx
om
(inherited(gv/sga))
→
Manx
aw
(inherited)