Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
offeren
←
Proto-Brythonic
*oferen
(inherited)
←
Middle Cornish
oferen
(cognate)
←
Latin
offerenda
(derived)
←
Latin
offerō
(mention)
←
Middle Welsh
offeren
(inherited)
←
Middle Breton
offeren
(cognate)
→
Welsh
offeiriad
(mention)