Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Saxon
fīftein
→
Old English
fiftiene
(cognate)
→
Old Norse
fimmtán
(cognate)
→
Old Norse
fimtán
(cognate)