Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
ar son
←
Scottish Gaelic
airson
(cognate)
←
Latin
sonus
(mention)
←
Old Irish
son
(mention)
←
Old Irish
sona
(mention)
←
Old Irish
sonus
(mention)
→
Scottish Gaelic
airson
(cognate)
→
Manx
er son
(cognate)