Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
tvennur
←
Proto-Germanic
*twinaz
(derived)
←
Old Norse
tvinnr
(derived)
→
English
twin
(cognate)
→
Icelandic
fern
(mention)
→
Icelandic
tvenna
(mention)