Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
-un
←
Proto-Germanic
*-ōniz
(inherited)
←
Old Norse
-an
(link)
←
Old Norse
-an
(link)
→
Old Norse
skipun
(suffix)
→
Old Norse
skǫpun
(suffix)
→
Old Norse
tǫpun
(suffix)