Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
ré
←
Proto-Celtic
*rowos
(inherited)
←
Proto-Celtic
*rowis
(derived)
←
Irish
raon
(mention)
←
Irish
rae
(alter)
←
Irish
rae
(alter)
←
Irish
reo
(alter)
←
Irish
leathré
(link)
←
Irish
roimh ré
(link)
←
Latin
rūs
(cognate)
←
Latin
resono
(derived)
←
Old Irish
roe
(inherited)
←
Old Irish
ré
(inherited)
→
Irish
leathré
(prefix)
→
Scottish Gaelic
raon
(cognate)