Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
trwyn
←
Breton
stroen
(cognate)
←
Welsh
ffroen
(mention)
←
French
trogne
(cognate)
←
Cornish
troen
(cognate)
→
Welsh
trwynol
(suffix)
→
French
trogne
(cognate)
→
Dutch
tronie
(cognate)