Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
clucge
←
Proto-Celtic
*klokkos
(derived)
←
Welsh
cloch
(cognate)
←
Old Irish
cloc
(cognate)
→
English
clock
(cognate)
→
French
cloche
(mention)