Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
French
trogne
←
Breton
stroen
(cognate)
←
Gaulish
trugna
(borrowed)
←
Gaulish
*srogna
(mention)
←
Welsh
trwyn
(cognate)
←
Cornish
troen
(cognate)
→
English
trone
(cognate)
→
Welsh
trwyn
(cognate)