Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
reikna
→
Scanian
regna
(inherited)
→
Icelandic
reikna
(derived)
→
Norwegian Bokmål
rakne
(mention)
→
Norwegian Nynorsk
rekna
(derived)
→
Swedish
räkna
(derived)