Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
eitigh
←
Middle Irish
etchid
(inherited)
←
Middle Irish
etigid
(mention)
←
Middle Irish
eitech
(mention)
←
Old Irish
as·toing
(derived)
→
English
Kennedy
(cognate)