Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*klārom
→
English
clarsach
(mention)
→
Welsh
clawr
(inherited)
→
Scottish Gaelic
clàr
(mention)
→
Manx
claare
(inherited)
→
Old Irish
clár
(inherited)