Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Proto-West Germanic *jā

Old English gea (inherited)
Middle English ye (inherited)
Norwegian Bokmål jepp (derived)
Saterland Frisian je (inherited)
Saterland Frisian jee (inherited)
Saterland Frisian (inherited)