Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latin
vatrax
←
Proto-Germanic
*waþwô
(cognate)
←
Proto-Indo-European
*wat-
(derived)
←
Latin
vatius
(mention)