General Rozwadowski left behind a wife, a daughter, and a son. The greater part of his fortune was lost in a business venture to benefit the soldiers who fought under his command. His daughter, Melania Josefina, seems to have died under mysterious circumstances in the 1970s and never married. The son, Jozef, was an artillery officer in the Polish Army and was also awarded the Virtuti Militari. In the 1930s, he was forced to resign his commission and emigrate to the United States due to his continued support for the pro-democratic and anti-Piłsudski forces in Poland. He emigrated to the United States and worked as an engineer and designed the elevators in the Empire State Building. He also contributed to the design of the Polish Pavilion in the 1939 New York World's Fair and the 1964 World's Fair. He was survived by one daughter, Melanie Josephine, one granddaughter, Calia Brencsons-Van Dyk (see List of Latvians), and one great-grandson, Joseph, all living in the United States.