Lady Elizabeth de Montfort, Baroness Montagu (died August 1354) was an English noblewoman.

[1][2] Her grandfather was Peter de Montfort (1205–1265), the first Speaker of the House of Commons, whose wife was Alice Audley.

[3] Her marriage to William Montagu was arranged by Eleanor of Castile, the first wife of King Edward I of England.

Edward was eager to make peace with the aristocracy after the battle, and things were fairly well patched up within a few years.

This meant that two chantry priests would say daily mass in black robes bearing the Montacute and Montfort coats of arms.