Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
Bjartur
←
Proto-Germanic
*berhtaz
(derived)
←
Icelandic
bjartur
(mention)
←
Old Norse
bjartr
(derived)