Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Saxon
aha
←
Proto-Germanic
*ahwō
(inherited)
←
Proto-Indo-European
*h₂ekʷeh₂
(inherited)
→
Dutch
Aa
(cognate)
→
Old Norse
á
(cognate)