Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latin
Ordovices
←
Breton
horzh
(cognate)
←
Proto-Celtic
*ordos
(borrowed)
←
Proto-Celtic
*wiketi
(mention)
←
Welsh
gordd
(cognate)
←
Proto-Indo-European
*weyk-
(root)
←
Proto-Indo-European
*weyk-
(derived)
←
Latin
vincō
(mention)
←
Old Irish
ord
(cognate)
←
Old Irish
fichid
(cognate)
→
Welsh
gordd
(mention)