People from Pittsburgh

William Larimer "Larry" Mellon Jr. (1910–1989) was an American philanthropist and physician.
Mellon was born in Pittsburgh June 26, 1910, the son of financier William Larimer Mellon Sr. and a grandnephew of U.S. Treasury Secretary Andrew W. Mellon. His family fortune derived from Gulf Oil, Westinghouse, BNY Mellon, Koppers, Alcoa and others.Mellon was married twice, the second time to dude ranch riding instructor and single mother Gwen Grant Mellon in 1946. He attended Princeton University for one year, worked for his family's company, Mellon Financial, and served in the OSS during World War II.
Mellon owned and operated a cattle ranch in Arizona until, at the age of 37, he read about, and then studied, Albert Schweitzer's medical missionary work in Gabon, and resolved, with Schweitzer's encouragement and guidance, to create a similar third-world hospital. He and Gwen Grant Mellon enrolled at Tulane University; he received his medical degree in 1954 at the age of 44, and she became qualified as a medical-laboratory technician. In 1956, the Mellons opened the Hôpital Albert Schweitzer Haiti in Deschapelles, Haiti.Mellon died in Deschapelles at the age of 79 from cancer and Parkinson's disease, on August 3, 1989.

Philip Hershkovitz (12 October 1909 – 15 February 1997) was an American mammalogist. Born in Pittsburgh, he attended the Universities of Pittsburgh and Michigan and lived in South America collecting mammals. In 1947, he was appointed a curator at the Field Museum of Natural History in Chicago and he continued to work there until his death. He published much on the mammals of the Neotropics, particularly primates and rodents, and described almost 70 new species and subspecies of mammals. About a dozen species have been named after him.

John Walker III (December 24, 1906 – October 16, 1995) was an American art curator, and the second director of the National Gallery of Art, from 1956 to 1969.

Matthew Cvetic (March 4, 1909 – July 26, 1962) was a Pittsburgh native who was a spy and informant working for the Federal Bureau of Investigation inside the Communist Party of the United States (CPUSA) during the 1940s. He told his story in a series in the Saturday Evening Post, and his experiences were then fictionalized in the old time radio show I Was a Communist for the FBI, adapted for a Warner Brothers motion picture in 1951. He testified before the House Un-American Activities Committee in the 1950s.