Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Welsh
awyr
←
Proto-Brythonic
*auɨr
(inherited)
←
Ancient Greek
ἀήρ
(derived)
←
Latin
āēr
(derived)
→
Welsh
awyr
(inherited)