Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
Donua
←
Proto-Celtic
*Dānowyos
(derived)
←
Proto-Celtic
*Dānu
(mention)
←
Welsh
Donwy
(mention)
←
Proto-Indo-European
*déh₂nu
(derived)
←
Proto-Indo-European
*dʰenh₂-
(mention)