Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Faroese
ein
←
Proto-Germanic
*ainaz
(inherited)
←
Proto-Indo-European
*óynos
(inherited)
←
Old Norse
einn
(inherited)
→
Faroese
eintal
(compound)
→
Westrobothnian
ajn
(mention)
→
Gutnish
ajn
(mention)
→
Icelandic
einn
(cognate)