Józef Michał Poniatowski was a Polish szlachcic, a composer and an operatic tenor. He was the nephew of the Polish general Prince Józef Antoni Poniatowski. Wikipedia
Born: February 21, 1816, Rome, Italy
Died: July 1873 (age 57 years), London, United Kingdom
Parents: Stanisław Poniatowski
Children: Józef Stanisław Poniatowski
Grandchild: André Poniatowski