| Marguerite d'Enghien | |
| Countess of Brienne Countess of Conversano Heiress of Enghien Lady of Beauvois | |
| Spouse: | Pierre de Baux Giacopo Sanseverino John of Luxembourg, Sire of Beauvois |
| Issue: | Peter of Luxembourg, Count of Saint-Pol John II of Luxembourg, Count of Ligny Louis of Luxembourg Catherine of Luxembourg Jeanne of Luxembourg |
| Birth Date: | 1365 |
| Father: | Louis of Enghien |
| Mother: | Giovanna of Sanseverino |
| Noble Family: | Enghien |
Marguerite d'Enghien (born 1365 - d. after 1394), was the ruling suo jure Countess of Brienne and of Conversano, suo jure Lady of Enghien, and Lady of Beauvois from 1394 until an unknown date.
Marguerite was born in 1365, the eldest daughter of Louis of Enghien, Count of Brienne and Conversano, Lord of Enghien, Titular Duke of Athens, and Giovanna of Sanseverino. Marguerite had a brother, Antoine who died at the age of sixteen, leaving her, the eldest daughter, heir to her father's estates and titles.
She inherited the counties of Brienne and of Conversano, and the Lordship of Enghien from her father Louis of Enghien on 17 March 1394. She was the wife of John of Luxembourg, Sire of Beauvois and the mother of Peter of Luxembourg, Count of Saint-Pol, Count of Brienne and of Conversano who inherited her fiefs, and John II of Luxembourg, Count of Ligny.
Marguerite became the suo jure Countess of Brienne and Conversano, and Dame of Enghien upon her father's death on 17 March 1394. Her husband John also became Count of Brienne and of Conversano by right of his wife.
She died on an unknown date sometime after 1394. Her will was dated 19 September 1393. Her eldest son, Peter received her titles of Brienne and of Conversano.
On an unknown date, Marguerite married her first husband, Pierre de Baux, and following his death, she married as her second husband, a relative of her mother, Giacopo of Sanseverino. Both of these early marriages were childless.
In 1380, after Giacopo's death, Marguerite married her third husband, John of Luxembourg, Sire of Beauvois (1370–1397). He was the son of Guy of Luxembourg, Count of Saint-Pol and Mahaut of Châtillon, Countess of Saint-Pol. By her third husband, Marguerite had five children:[1]