Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Serbo-Croatian
potom
→
Lower Sorbian
pótom
(cognate)
→
Serbo-Croatian
potomstvo
(suffix)
→
Serbo-Croatian
potomak
(link)