Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
ætur
←
Proto-Germanic
*ētijaz
(derived)
←
Old Norse
ætr
(derived)
→
Icelandic
óætur
(affix)