Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scots
-um
←
Old English
-um
(inherited)
←
Middle English
-um
(inherited)
←
Latin
-um
(mention)
←
Scots
legim
(mention)
←
Scots
-ings
(mention)