Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Indo-European
*wokʷtlom
→
Irish
focal
(inherited)
→
Scottish Gaelic
facal
(inherited)
→
Manx
fockle
(inherited)
→
Old Irish
focul
(inherited)