Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Saxon
kennian
←
Proto-Germanic
*kannijaną
(inherited)
←
Proto-Germanic
*kanjaną
(inherited)
←
Proto-Indo-European
*ǵneh₃-
(root)
→
Old English
cennan
(cognate)
→
Old Saxon
antkennian
(prefix)