Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
hvolf
←
Proto-Germanic
*hwalbą
(inherited)
←
Old Norse
hválf
(inherited)
→
English
whelm
(cognate)
→
Icelandic
hólf
(mention)