Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
Nuechtegailchen
←
Proto-West Germanic
*nahtigalā
(inherited)
←
Old High German
nahtigala
(inherited)
←
Luxembourgish
(suffix)
←
Luxembourgish
chen
(suffix)