Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Saxon
treuwa
→
Old English
treow
(cognate)
→
Faroese
trúgv
(derived)
→
Old High German
triuwa
(cognate)