Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
seoid
←
Irish
séad
(doublet)
←
Irish
seod
(alter)
←
Scottish Gaelic
seud
(cognate)
←
Old Irish
sét
(inherited)
→
Irish
séad
(doublet)
→
Scottish Gaelic
seud
(cognate)