Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
Eðna
←
Old Irish
Ethniu
(derived)
→
Scottish Gaelic
Eithne
(cognate)
→
Icelandic
Eðna
(inherited)