Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
bro
←
Proto-Brythonic
*broɣ
(inherited)
←
Proto-Celtic
*mrogis
(inherited)
←
Old Irish
mruig
(cognate)
←
Middle Welsh
bro
(inherited)
→
Welsh
brëyr
(mention)
→
Old Irish
mruig
(cognate)