Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Irish
persa
←
Latin
persōna
(derived)
←
Old Irish
persan
(inherited)
→
Irish
pearsa
(inherited)
→
Irish
pearsanta
(cognate)
→
Scottish Gaelic
pearsa
(inherited)
→
Scottish Gaelic
pearsanta
(cognate)
→
Middle Irish
persanda
(suffix)