Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle English
oon
←
Old English
ān
(inherited)
→
English
alone
(mention)
→
English
-o
(mention)
→
Middle English
ilkon
(compound)
→
Middle English
onen
(affix)
→
Middle English
allone
(compound)
→
Middle English
oonly
(suffix)
→
Middle English
ooneyed
(affix)
→
Scots
an
(inherited)
→
Scots
ane
(mention)
→
Yola
oan
(inherited)