Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
Iðavǫllr
←
Old Norse
*iða
(mention)
←
Old Norse
vǫllr
(mention)
←
Old Saxon
-
(cognate)