Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
tuttugu
←
Proto-Germanic
*twai tigiwiz
(derived)
←
Old Norse
tuttugu
(derived)
→
Alemannic German
zwänzg
(cognate)
→
Alemannic German
zwenzig
(cognate)