Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Saxon
twēne
→
Old High German
zwene
(cognate)
→
Old Norse
tveir
(cognate)
→
Old Frisian
twene
(cognate)