Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
lí
←
Proto-Celtic
*līwos
(derived(sga/ga))
←
Proto-Celtic
*līwos
(inherited)
→
Irish
lí
(inherited)
→
Scottish Gaelic
laghach
(mention)