Message in a bottle

We found a message a while back in a bottle at the Dutch coast (Harlingen, a city at the ‘Waddenzee’)

ChatGPT translated it and it’s a long shot if anyone here knows Poitrus, Korus and Kajunia (all young kids probably, Poitrus was 6 at the time of writing). But if someone does, tell them there wishes are received and appreciated, and al best wishes back.