Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
kerroo
←
Irish
ceathrú
(cognate)
←
Manx
kiare
(mention)
←
Old Irish
cethramad
(inherited)
←
Old Irish
cethair
(mention)