Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
East Central German
er
→
East Central German
Bunzler
(suffix)
→
Old High German
er
(link)
→
Old High German
er
(link)
→
Old High German
er
(link)