Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latin
Lexovii
←
Gaulish
*lexsovio
(mention)
←
Proto-Celtic
*lungeti
(cognate)
←
Welsh
llechwedd
(cognate)
←
Irish
losc
(cognate)
←
Ancient Greek
Ληξόβιοι
(derived)
←
Ancient Greek
Ληξούβιοι
(mention)
←
Ancient Greek
λοξός
(cognate)
←
Proto-Indo-European
*lewg-
(derived)
→
Welsh
llechwedd
(mention)