Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Saterland Frisian
jä
←
German
ja
(cognate)
←
West Frisian
ja
(cognate)
←
Proto-West Germanic
*jā
(inherited)
←
Old Frisian
jē
(inherited)
←
Saterland Frisian
jee
(doublet)
→
Saterland Frisian
jee
(doublet)