Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
prúna
←
Irish
pluma
(doublet)
←
Ancient Greek
προῦνον
(derived)
←
Ancient Greek
προῦμνον
(mention)
←
Latin
prūnum
(derived)
→
Irish
pluma
(doublet)