Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
gleann
←
Proto-Celtic
*glendos
(inherited)
←
Old Irish
glenn
(inherited)
→
English
glen
(derived)
→
English
Glynn
(derived)
→
Manx
glion
(cognate)