Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
peacach
←
Irish
peaca
(mention)
←
Old Irish
pecthach
(inherited)
←
Old Irish
peccach
(mention)
←
Old Irish
pecach
(mention)
←
Old Irish
peccad
(mention)
←
Old Irish
pecad
(mention)
→
Irish
peacaigh
(link)