Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
stroin
←
Proto-Celtic
*srognā
(derived)
←
Welsh
ffroen
(cognate)
←
Old Irish
sróin
(inherited)
←
Old Irish
srón
(mention)
→
Manx
stroineairkagh
(compound)