Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
cuþ
←
Old English
cunnan
(mention)
←
Proto-Germanic
*kunþaz
(inherited)
←
Proto-Indo-European
*ǵneh₃-
(root)
←
Old Saxon
kuth
(cognate)
←
Old Saxon
kunnan
(mention)