Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
dat
←
Proto-Germanic
*þat
(inherited)
←
Old High German
that
(inherited)
←
Old High German
dat
(mention)
←
Old High German
daz
(mention)
←
Limburgish
dat
(cognate)
←
Dutch
dat
(cognate)
→
Luxembourgish
datt
(mention)
→
Luxembourgish
tëscht
(mention)