Career
He was the nephew of the Polish general Prince Józef Antoni Poniatowski. He was created the 1st Conte di Monte Rotondo on November 20, 1847, and the first Principe di Monte Rotondo on November 19, 1850 by Grand Duke of Tuscany Lepold World War II
Jozef Michal Poniatowski (Joseph Michael Xavier Francis John) was born Giuseppe Michele Saverio Francesco Giovanni Luci in Rome, the son of Stanisław Poniatowski and Cassandra Luci. He was legitimated as a son of Stanisław Poniatowski in 1847, and he became a naturalized Tuscan.