Overview
Antonio I Boncompagni (10 April 1658 – 28 January 1731) was an Italian nobleman and the 6th Duke of Sora. By his marriage, he also was Prince-Consort of Piombino.
Biography
He was the fourth son of Ugo, 4th Duke of Sora and Duchess Maria Ruffo di Bagnara.
He grew up in the shadow of his 3 elder brothers, and was not expected to succeed his father.
But when his eldest brother Gregorio only had daughters, and the two other brothers became clerics, it was decided in 1701 that Antonio would marry his brother's eldest daughter Maria Eleonora, to succeed his brother.
Antonio and Maria Eleonora had 5 children :
Maria Olimpia (1703-05),
Niccolo (1704-09),
Francesca Cecilia (1705-75), married Francesco Maria Carafa, IV principe di Belvedere,
Gaetano (1706-1777), their successor,
Pietro Gregorio (1709-1747), married Maria Francesca Ottoboni, II Duchess of Fiano.
Indeed, his brother died in January 1707, and Antonio became the next Duke of Sora.
From Wikipedia (CC BY-SA 4.0).