Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
Sows
←
Proto-Brythonic
*Seis
(inherited)
←
Proto-Brythonic
*Saïson
(mention)
←
Welsh
Sais
(cognate)
←
Proto-West Germanic
*sahs
(derived)
←
Latin
Saxō
(derived)
←
Latin
Saxōnēs
(mention)
→
Welsh
Sais
(cognate)
→
Cornish
Pow Sows
(compound)
→
Cornish
Sowses
(suffix)