Hugh Dudley Auchincloss, Jr. (August 15, 1897 – November 20, 1976) was an American stockbroker and lawyer who became the second husband of Janet Lee Bouvier, the mother of Jacqueline Kennedy Onassis.
Auchincloss was born at Hammersmith Farm in Newport, Rhode Island. He was the son of Hugh Dudley Auchincloss (1858–1913), a merchant and financier, and Emma Brewster Jennings, daughter of Oliver B. Jennings, a founder of Standard Oil. His uncles were Edgar Stirling Auchincloss (father of James C. Auchincloss) and John Winthrop Auchincloss (grandfather of Louis Auchincloss).[1][2] He had two older sisters, Esther Judson Auchincloss and Ann Burr Auchincloss.
Auchincloss graduated in 1920 from Yale University, where he was elected to the Elihu Senior Society. He earned a law degree from Columbia University in 1924. Auchincloss served in the United States Navy during World War I and worked for the Office of Naval Intelligence and the War Department during World War II. Auchincloss had been a special agent with the Commerce Department before joining the State Department as an aviation specialist in 1927. Four years later, he resigned government service and used some of the enormous inheritance from his mother to found the Washington brokerage firm of Auchincloss, Parker & Redpath.
His first marriage, from June 4, 1925, to 1932, was to Maya de Chrapovitsky, a Russian noblewoman. They had one child, Hugh D. "Yusha" Auchincloss III (born 1927). His second, from 1935 to 1941, was to Nina S. Gore (1903–1978), mother of author Gore Vidal. They had two children, Nina Gore Auchincloss (born 1935) and Thomas Gore Auchincloss (born 1937). On June 21, 1942, he married Janet Lee Bouvier, who was already mother of Jacqueline Kennedy Onassis and Lee Radziwill. They had two children, Janet Jennings Auchincloss (1945–1985) and James Lee Auchincloss (born 1947).
Auchincloss was responsible for the then Jacqueline Bouvier getting her first job in journalism at the Washington Times-Herald. He gave her away at her wedding to future president John F. Kennedy, the reception of which was held at Hammersmith Farm on September 12, 1953. A long-time financial contributor to the Republican Party, he contributed to the campaign of his Democratic son-in-law, saying "I want to live in harmony with Mrs. Auchincloss and all the other members of the family."