Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Saxon
tiohan
←
Proto-West Germanic
*teuhan
(inherited)
←
Proto-Indo-European
*dewk-
(root)
→
Old English
teon
(cognate)
→
Old Saxon
atiohan
(prefix)