Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-West Germanic
*rekan
→
English
reckon
(derived)
→
Old English
recan
(inherited)
→
German
rechen
(inherited)
→
Pennsylvania German
reche
(inherited)