Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
Rómhánach
←
Irish
-ach
(affix)
←
Latin
Rōmānus
(derived)
←
Old Irish
Rómánach
(inherited)
←
Old Irish
Rómán
(mention)
→
Irish
Gréag-Rómhánach
(affix)
→
Irish
Gall-Rómhánach
(affix)
→
Scottish Gaelic
Ròmanach
(cognate)