Bertha Isayeva’s mother Anna Erlihman's birth roster 1900 Bertha Isayeva’s father David Erlihman's birth roster 1900 Bertha Isayeva’s maternal grandmother Dvoira Blehman 1910 Bertha Isayeva’s paternal grandfather Yoina Erlihman 1910 Bertha Isayeva 1925 Bertha Isayeva’s father's cousin brother Leonid Ledovskiy 1935 Bertha Isayeva’s father's brother Naum Erlihman 1936 Bertha Isayeva’s Komsomol membership card 1938 Bertha Isayeva’s father's cousin brother Iohan Zeltser with his family 1938 Bertha Isayeva 1938 Bertha Isayeva, and her co-students 1944 Bertha Isayeva’s father David Erlihman 1948 Bertha Isayeva with her one-year-old son Eduard 1953 Bertha Isayeva’s mother Anna Erlihman and her sisters 1956 Bertha Isayeva 1986