Peter Zanca (October 29, 1908, New York City - July 31, 1976, San Antonio, Texas was an American physician who served as a doctor in the US Army for 25 years, achieving the rank of Colonel, and then served as Professor and founding Chairman of the Department of Radiology for the University of Texas Medical School at San Antonio. Zanca married Helen F. Allen of Roanoke, Virginia in 1938. They had three sons, Joseph H., Peter A., and William S. Zanca. Mrs. Zanca died of leukemia in 1947. Zanca later married Margaret Quaid in 1949 and had two sons, John E. and David G. Zanca.