Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
luaidhe
←
Proto-Celtic
*ɸloudom
(inherited)
←
Old Irish
lúaide
(inherited)
→
English
lead
(cognate)
→
Manx
leoaie
(cognate)