Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
srennaid
←
Proto-Celtic
*sregneti
(inherited)
←
Proto-Indo-European
*sregʰ-
(derived)
→
Scottish Gaelic
srann
(inherited)
→
Ancient Greek
ῥέγκω
(cognate)