Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
Dé Sathairn
←
Latin
diēs Sāturnī
(derived)
←
Old Irish
día Sathairn
(inherited)
→
Manx
Jesarn
(cognate)