Lawrence Gellert, born Laslow Grünbaum, September 14, 1898, in Budapest, Hungary, died 1979 (Gellert disappeared in 1979, his exact death date is unknown), was a music collector, who, in the 1920s and 1930s, amassed a significant collection of field-recorded African-American blues and spirituals and also claimed to have documented black protest traditions in the South of the United States.