Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
Donnaghey
←
Irish
Donncha
(cognate)
←
Scottish Gaelic
Donnchadh
(cognate)
←
Old Irish
Donnchad
(inherited)
←
Old Irish
donn
(mention)
←
Old Irish
cath
(mention)