Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
ponc
←
Irish
pointe
(doublet)
←
Latin
punctum
(derived)
←
Old Irish
[[ponc]], [[punc]]
(inherited)
→
Irish
pointe
(doublet)