John of Luxembourg, Count of Soissons
This article relies largely or entirely on a single source. (November 2012)
He was the eldest son of Louis de Luxembourg, Count of Saint-Pol and Jeanne de Bar, Countess of Marle and Soissons.
When his mother died in 1462, he became Count of Marle and Soissons.
John became a Knight in the Order of the Golden Fleece in 1473.
When his father was beheaded for treason in 1475, John wasn't able to inherite his lands, because they were confiscated.
John was killed one year later at the Battle of Morat.
He never married and his lands went to his younger brother Peter.