Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Spanish
Merlín
←
Proto-Celtic
[[*mori]] [[*dūnom]]
(derived)
←
Old French
Merlin
(derived)
←
Old Welsh
Myrddin
(derived)