Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
marg
←
Old English
marc
(derived)
←
Irish
brugh
(doublet)
←
Irish
marc
(doublet)
←
Proto-Germanic
*markō
(derived)
←
Proto-Germanic
*marką
(derived)
←
Old Norse
mǫrk
(derived)
←
Old Irish
marg
(inherited)
←
Old Irish
marg
(inherited)
→
Irish
marc
(doublet)
→
Irish
marc
(link)