Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
grán
←
Proto-Celtic
*grānom
(inherited)
←
Irish
gráinne
(doublet)
←
Proto-Indo-European
*ǵr̥h₂nóm
(inherited)
←
Old Irish
grán
(inherited)
→
Irish
gráinne
(doublet)