Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Saxon
af-
←
Proto-Germanic
*aba-
(inherited)
←
Proto-Indo-European
*h₂epó
(inherited)
→
Old English
of-
(cognate)
→
Luxembourgish
of-
(cognate)