Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
haeddu
←
Proto-Celtic
*sagyeti
(inherited)
←
Latin
sagio
(cognate)
←
Old Irish
saigid
(cognate)
→
Welsh
cyrraedd
(mention)