Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
cloc
←
Welsh
cloch
(doublet)
←
Middle English
clok
(borrowed)
←
Middle English
clokke
(mention)
→
Welsh
cloch
(doublet)