Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
North Frisian
ån
←
Proto-Germanic
*ainaz
(inherited)
←
Proto-Indo-European
*óynos
(inherited)
←
Old Frisian
ēn
(inherited)
→
English
one
(cognate)