Nettie Mermelstein was born in 1860 to Marton Berkovits. She married David Mermelstein, and had a child Rose (Mermelstein) Sobel. Nettie Mermelstein died at age 70 years old on February 16, 1931 at 2685 University Avenue, in Bronx County, New York United States, and was buried at Mount Hebron Cemetery 130-04 Horace Harding Expy.