Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
chomh
←
Welsh
cyn
(cognate)
←
Scottish Gaelic
cho
(cognate)
←
Middle Irish
com-
(inherited)
←
Old Irish
com-
(inherited)
→
Scottish Gaelic
cho
(cognate)