Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
hos
←
Proto-Brythonic
*(s)awyetos
(inherited(cy/kw))
←
Proto-Celtic
*awis
(inherited(cy/kw))
←
Proto-Indo-European
*h₂éwis
(inherited(cy/kw))
←
Middle Welsh
hwyat
(inherited(cy/kw))