Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
ríon
←
Proto-Celtic
*rīganī
(inherited)
←
Old Irish
rígain
(inherited)
→
Irish
banríon
(prefix)
→
Irish
ríonmháthair
(affix)
→
Scottish Gaelic
rìbhinn
(cognate)
→
Manx
rein
(cognate)