I am trying to find brothers and sisters of my great-great-great-grandfather. I had luck in having a relative of a sister e-mail me out of the blue.

Johann Gotthilf Bleschke married Juliane Gottliebe Littmann. He was born on October 14, 1806 in Oggerschutz, Prussia. He married on May 2, 1832. He died on March 29, 1863 in Schwiebus, Prussia (now Swiebodzin, Poland).

Their known children were Ferdinand Oswald and Wilhelmine.