Edmund of Woodstock, 1st Earl of Kent, whose seat was Arundel Castle in Sussex, was the sixth son of King Edward I of England, and the second by his second wife Margaret of France, and was a younger half-brother of King Edward II. Edward I had intended to make substantial grants of land to Edmund, but when the king died in 1307, Edward II refused to respect his father's intentions, mainly due to his favouritism towards Piers Gaveston. Edmund remained loyal to his brother, and in 1321 he was created Earl of Kent. He played an important part in Edward's administration as diplomat and military commander and in 1321–22 helped suppress a rebellion.

Margaret or Marguerite of France was Queen of England as the second wife of King Edward I. She was a daughter of Philip III of France and Maria of Brabant.