Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
náhvalur
←
Icelandic
hvalur
(mention)
←
Old Norse
náhvalr
(inherited)
←
Old Norse
nár
(mention)
←
Old Norse
hvalr
(mention)
→
English
narwhal
(cognate)