Hello Flora,
we have two Coldewey villages, one is a part of the town Wilhelmshaven (port on the Northsea) and the other is a part of the Community Ovelgönne.
Popkenhose should be Popkenhöge, this village is also a part of Ovelgönne on the borader to Coldewey.
The next corner is Strückhauser-Altendorf, Strückhausermoor and Strückhauser-Kirchdorf, also parts of Ovelgönne today.
I hope this help.
Werner