Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
bráthair
←
Proto-Celtic
*brātīr
(inherited)
←
Proto-Indo-European
*bʰréh₂tēr
(inherited)
←
Old Irish
bráthair
(inherited)
→
English
brother
(cognate)
→
Irish
bráithriúil
(affix)