James Louis Sobieski

James Louis Henry Sobieski (Polish: Jakub Ludwik Henryk Sobieski; French: Jacques Louis Henri de Sobieski; 2 November 1667 – 19 December 1737) was a crown prince (królewicz) of Poland in years 1674–1696 and duke on Oława in years 1691–1737, son of King of Poland and Grand Duke of Lithuania John III Sobieski and Marie Casimire d'Arquien.

He was prepared by his parents to succeed John III on the Polish throne. Due to the Polish nobility's reluctance to accept hereditary succession, his efforts to claim the Polish crown after his father's death and during the Second Northern War came to nothing. Through his marriage to Hedwig Elisabeth of Neuburg, the daughter of the Count Palatine of Neuburg, he became connected to the ruling families of Europe. He was proposed as a candidate for several European principalities but ultimately received the Duchy of Oława from the Emperor. Toward the end of his life, he returned to the family estate in Żółkiew in the Kingdom of Poland, where he died.