Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
ef
←
Proto-Germanic
*jabai
(derived)
←
Old Norse
ef
(derived)
→
English
if
(cognate)
→
Old English
gif
(mention)
→
Luxembourgish
ob
(cognate)