Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Ligurian
òtâvo
←
Proto-Indo-European
(derived)
←
Proto-Indo-European
*oḱtṓw
(mention)
←
Latin
octāvus
(derived)
←
Ligurian
éutto
(mention)