Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Germanic
*þō
→
German
da
(inherited)
→
Mòcheno
de
(derived)
→
Dutch
toen
(inherited)
→
Dutch
tû
(inherited(nl/gmw-jdt))
→
Old Norse
þau
(inherited)