, illegitimate son of Marchese Clemente Orrigo by Rosa Tarsis, who was married to Pompeo Litta at the time of Antonio's birth in 1892. Antonio was repudiated by Pompeo Litta in 1895, and given the surname Pelagi; his parents married in 1899. Antonio was recognized as the natural son of Clemente in 1921. Subsequently styled as Marchese Origo