Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Prussian
brāti
←
Proto-Indo-European
*bʰréh₂tēr
(derived)
→
Crimean Gothic
bruder
(cognate)
→
Lithuanian
brolis
(cognate)