Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
gaukur
←
Proto-Germanic
*gaukaz
(derived)
←
Old Norse
gaukr
(derived)
→
German
Gauch
(cognate)
→
Icelandic
páfagaukur
(mention)