| Peter of Luxembourg | |
| Count of Brienne, Conversano and Saint-Pol | |
| Spouse: | Margaret de Baux |
| Spouse-Type: | Spouse |
| Issue: | Louis of Luxembourg Jacquetta of Luxembourg Thibaud of Luxembourg Jacques of Luxembourg Valeran of Luxembourg Jean of Luxembourg Catherine of Luxembourg Isabelle of Luxembourg Philippa of Luxembourg |
| House: | House of Luxembourg |
| Father: | John of Luxembourg, Lord of Beauvoir |
| Mother: | Marguerite of Enghien |
| Birth Date: | 1390 |
| Birth Place: | Naples, Kingdom of Naples[1] [2] |
| Death Date: | 31 August 1433 (aged 42–43) |
| Death Place: | Rambures, Picardy, France |
| Burial Place: | Cercamp abbey |
Peter of Luxembourg (1390 – 31 August 1433) was count of Saint-Pol. His inheritance included the counties of Brienne, Conversano and Saint-Pol.
Peter was the son of John of Luxembourg, Lord of Beauvoir, and mother, Marguerite of Enghien. They had co-reigned as Count and Countess of Brienne from 1394 to her death in 1397. His name originates from the fact that he was a 6th generation descendant of Henry V, Count of Luxembourg, and thus belonged to the French branch of the House of Luxembourg.
Peter succeeded his aunt Jeanne of Luxembourg, Countess of Saint-Pol and Ligny, as Count of Saint-Pol in 1430.
On 8 May 1405, Peter married Margaret de Baux, the daughter of Francis of Baux and his third wife Sueva Orsini. Peter and Margaret had:
Peter also had 1 illegitimate child:
The Black Death hit Luxembourg, France, England and Spain in the 1340s when it causing the deaths of millions of people; and it continued to re-appear at intervals over the succeeding centuries. Peter was among its victims. He died at Rambures on 31 August 1433, aged 43 years, and was buried in the abbey at Cercamp, near Frévent. His wife died 36 years later.