John of Luxembourg (Jean de Luxembourg) (c. 1370 – bef.

2 July 1397, Italy[1]), was Lord of Beauvoir (or Beaurevoir) and Richebourg, and also (as John II) Count of Brienne and Conversano (iure uxoris).

He was a member of the French branch of the House of Luxembourg, the son of Guy I of Luxembourg, Count of Ligny and Mahaut de Châtillon (1335–1378), Countess of Saint-Pol.

[2] Blessed Pierre de Luxembourg was his brother.

John married around 1387 with Margaret, Countess of Brienne, daughter of Louis of Enghien,[3] suo jure heiress of the counties of Brienne and of Conversano, and the Lordship of Enghien.