Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
océn
←
Ancient Greek
Ὠκεανός
(derived)
←
Latin
ōceanus
(borrowed)
→
Welsh
eigion
(cognate)
→
Irish
aigéan
(inherited)
→
Irish
aigeal
(inherited(ga/gd))