Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
Gloyw
←
Proto-Brythonic
*gluɨw
(derived)
←
Welsh
gloyw
(mention)
←
Welsh
gloyw
(mention)
←
Old Cornish
Gloiucen
(cognate)
←
Old Cornish
Gloiumed
(mention)
←
Old Welsh
gloiu
(derived)
←
Old Irish
glé
(cognate)
←
Middle Welsh
gloyw
(derived)