Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
cuas
←
Proto-Celtic
*kow-sto-
(inherited)
←
Proto-Celtic
*kuwo-
(mention)
←
Proto-Indo-European
*ḱowHós
(inherited)
←
Proto-Indo-European
*ḱewH-
(mention)
←
Middle Irish
cúa
(inherited)
←
Old Irish
cúas
(inherited)
→
English
Glasgow
(cognate)
→
Welsh
cau
(cognate)
→
Irish
Glaschú
(cognate)
→
Scottish Gaelic
Glaschu
(cognate)
→
Manx
Glaschu
(cognate)