Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
grudd
←
Proto-Celtic
*groudos-
(inherited)
←
Irish
grua
(cognate)
←
Scottish Gaelic
gruaidh
(cognate)
←
Cornish
grudh
(cognate)
→
Welsh
braich
(mention)
→
Irish
grua
(cognate)
→
Scottish Gaelic
gruaidh
(cognate)