Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
amma
←
Proto-Germanic
*ammǭ
(inherited(non/goh))
←
Proto-Germanic
*ammǭ
(inherited)
←
Proto-Indo-European
*amma
(inherited(non/goh))
←
Proto-Indo-European
*amma
(inherited)
→
Faroese
omma
(derived)
→
Icelandic
amma
(inherited)
→
Tocharian B
ammakki
(cognate)