Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
tvöfaldur
←
Proto-Germanic
*twifaldaz
(inherited)
←
Icelandic
tveir
(mention)
←
Icelandic
-faldur
(mention)
←
Old Norse
tvífaldr
(inherited)
→
English
twifold
(cognate)
→
Icelandic
tvöföld neitun
(mention)