Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*māyos
→
Welsh
hwy
(mention)
→
Welsh
mwy
(inherited)
→
Irish
mó
(inherited)
→
Scottish Gaelic
mò
(inherited)
→
Manx
moo
(inherited)