Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*yegis
→
Welsh
iâ
(inherited)
→
Welsh
iäen
(inherited)
→
Old Irish
aig
(inherited)
→
Old Irish
yey
(inherited(sga/kw))
→
Old Irish
oighear
(inherited(sga/ga))
→
Old Irish
eigh
(inherited(sga/gd))