Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Primitive Irish
ᚉᚓᚂᚔ
←
Proto-Celtic
*kēlyos
(inherited)
←
Welsh
cilydd
(cognate)
→
English
Kelleher
(derived)
→
Irish
céile
(inherited)
→
Scottish Gaelic
cèile
(inherited)
→
Old Irish
céile
(inherited)