My grandfather's nephew got to Israel in the late 30s from Tyczyn, which is now in Poland.. We do not know his name, but the last name might be Blumenberg. His mother's maiden surname was Eisen. My grandfather (named Markus in Tyczyn) was her brother, and he had another brother named Moses and possibly one named Jacob, as well as some other siblings, we believe, including This an aunt named Rachel (Ruchel?) who lived in Paris. His grandfather married twice, and there was offspring from both marriages. He was found by a friend of my grandfather after the war, a man named Jack Krieger, but he never wrote to my grandfather or answered my gf's letter. My family would like to find him, if possible. He would be anywhere from his 70s to his 80s, we think.