 Her mother was the former Margaret Clarke (1898–1955) of Peoria, Illinois.She had two brothers, "Don" Carlo Caracciolo (1925–2008), who inherited their father's titles in 1965 and founded the newspaper "La Repubblica," being known as the "editor prince", referring to his aristocratic birth and elegant manner; and "Don" Nicola Caracciolo (born 1931), the holder since 2008 of the titles, as 10th Prince di Castagneto, 5th Duke di Melito, and hereditary Patrician of Naples.She was married in Osthoffen to Fiat tycoon Gianni Agnelli on 19 November 1953; they would remain married until his death on 24 January 2003.