Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
aeg
←
Proto-Celtic
*yowankos
(inherited)
←
Welsh
ieuanc
(cognate)
←
English
young
(cognate)
←
Proto-Indo-European
*h₂yuh₁en-
(inherited)
←
Old Irish
óc
(inherited)
→
Manx
aegan
(mention)
→
Manx
aegid
(suffix)