Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
gorffen
←
Breton
gourfennañ
(cognate)
←
Cornish
gorfedna
(cognate)
←
Old Welsh
guor
(compound)
←
Old Welsh
phenn
(compound)
←
Middle Welsh
penn
(mention)
→
Welsh
Gorffennaf
(compound)
→
Welsh
gorffennol
(affix)