Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
la
←
Proto-Celtic
*letos
(derived)
←
Proto-Celtic
*ɸletos
(mention)
←
Latin
latus
(cognate)
←
Old Irish
leth
(mention)
→
Irish
le
(inherited)
→
Irish
libh
(compound)
→
Scottish Gaelic
le
(inherited)
→
Manx
lesh
(mention)