Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Saterland Frisian
er
←
German
er
(cognate)
←
West Frisian
er
(cognate)
←
Proto-West Germanic
*iʀ
(inherited)
←
Old Frisian
-er
(inherited)
→
Saterland Frisian
leeter
(suffix)
→
Saterland Frisian
Säänder
(suffix)
→
Saterland Frisian
Spreeker
(suffix)