Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Slavic
*(j)a
→
Lower Sorbian
ja
(inherited)
→
Upper Sorbian
ja
(inherited)
→
Serbo-Croatian
ja
(inherited)
→
Slovak
ja
(inherited)