Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Plautdietsch
Grauf
←
Proto-Germanic
*grabą
(inherited)
←
Middle Low German
grav
(inherited)
←
Old Saxon
graf
(inherited)
→
Luxembourgish
Graf
(cognate)