Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
French
où
←
French
ou
(mention)
←
Middle French
où
(inherited)
←
Old French
ou
(inherited)
←
Latin
ubi
(inherited)
→
Dalmatian
jo
(cognate)
→
French
d'où
(mention)
→
French
éyoù
(affix)
→
Old Spanish
o
(cognate)
→
Portuguese
u
(cognate)