Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
maige
←
Proto-Celtic
*magyos
(inherited)
←
Proto-Indo-European
*méǵh₂yos
(inherited)
←
Proto-Indo-European
*méǵh₂s
(derived)
→
Ancient Greek
μέγας
(cognate)
→
Latin
magnus
(cognate)
→
Latvian
mazs
(cognate)