John of Beaumont also known as John of Hainault (1288–1356) Parents John I of Hainaut Philippa of Luxembourg Children Jeanne of Hainault Siblings Alice of Hainault William I, Count of Hainaut Mary of Avesnes Willem Cuser Jan van Oostervant Aleida de Hainaut Isabelle of Avesnes Simon Heer van Bruelis Marguerite d'Avesnes Partners Margaret of Soissons
