Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
ktoś
←
Polish
kto
(affix)
←
Polish
-ś
(affix)
→
Belarusian
хтось
(cognate)
→
Kashubian
chtos
(cognate)
→
Polish
-ś
(link)