Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Saterland Frisian
Oaler
←
Proto-Germanic
*aldrą
(inherited)
←
Old Frisian
alder
(inherited)
→
Alemannic German
Altar
(cognate)