Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latin
Celbis
←
Proto-Celtic
*gilum
(derived)
←
Proto-Germanic
*gilją
(cognate)
→
English
Kill
(derived)
→
German
Ruhr
(mention)