Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
Gweniver
←
Proto-Brythonic
*Gwɨnnohuɨβar
(derived)
←
Middle Cornish
Gwynnever
(derived)
←
English
Jennifer
(cognate)