Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
reyna
←
Old Norse
reyna
(inherited)
→
Proto-Norse
ᚱᚨᚢᚾᛁᛃᚨᛉ
(cognate)
→
Icelandic
reynsla
(affix)