Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Saxon
hwaner
←
Proto-Germanic
*hwan
(inherited)
←
Dutch
wanneer
(cognate)
←
Old Dutch
*wan ēr
(cognate)
←
Old Saxon
*hwan
(compound)
←
Old Saxon
ēr
(compound)