Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
rót
←
Old English
rad
(borrowed)
→
Irish
ród
(inherited)
→
Scottish Gaelic
rathad
(inherited)
→
Manx
raad
(inherited)