Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
trua
←
Irish
do
(mention)
←
Middle Irish
trúaige
(inherited)
←
Middle Irish
trúag
(inherited)
←
Old Irish
trógae
(inherited)
←
Old Irish
tróg
(inherited)
→
Welsh
trueni
(mention)
→
Manx
treih
(cognate)