Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Indo-European
*kapno-
→
Irish
cuan
(derived)
→
Scottish Gaelic
cuan
(derived)
→
Old Irish
cúan
(inherited(sga/mga))