Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
gionach
←
Welsh
gen
(cognate)
←
Proto-Indo-European
*ǵénus
(inherited)
←
Old Irish
ginach
(inherited)
←
Old Irish
ginech
(mention)
←
Old Irish
genech
(mention)
←
Old Irish
genach
(mention)
←
Old Irish
gin
(mention)