So glad to hear from you!! There were 13 Christinecks listed on the Amburger Projekt website, including your ggg grandmother and my ancestor Johann Andreas Christineck born 1684. They are a mystery to me. I have found Johann's birth in Lubnitz, Brandenburg 1684. He had a first wife but I have not found that record. I have found only his second marriage listed in 1733 in Haseloff, Brandenburg (close to Lubnitz) listing him as a "widower" and age 49 in 1733 when he married Christiane Elisabeth Michaelis who was born 1714 in nearby Jessen, Schweinitz, in Sachsen-Anhalt, Germany. My grandfather wrote in 1912 that his ancestor was "Prince Christineck", losing an estate and escaped "a duel in Austria"! I have traced the Christinecks back to 1650 in Lubnitz/Haseloff/Dahnsdorf in Brandenburg, Germany. I have also found letters written by an ancestor stating Queen Christina of Sweden was possibly involved with Christinecks in 1650!
Karl was possibly a brother, cousin or nephew of my Johann Andreas. I have researching this for twenty years and it's still a mystery for me. I knew Freedericksz was married to Regina Luise Christineck. Where are you from?
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I have received materials from Amburger Projekt.
Warm greetings from Pompano Beach, Florida.