Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Lithuanian
blaĩvas
→
Breton
bloaz
(cognate)
→
Welsh
blwydd
(cognate)
→
Cornish
bledhen
(cognate)
→
Old Irish
blíadain
(cognate)