Arms of the House of Arkel, as shown with two cross-ribbed bars, possibly derived from the assault on the Tower of Damietta during the Fifth Crusade, where ladders were used
Maria van Arkel (c. 1385 – 19 July 1415) was the only daughter and heiress of Lord John V of Arkel and Joanna of Jülich. She inherited the title to Gelderland from her maternal uncle, Duke Reginald IV, and her son became Arnold, Duke of Gelderland. She was the paternal grandmother of Mary of Guelders, who became Queen of Scots.
Her father, John of Arkel (died 25 August 1428), was the son of Otto of Arkel and Isabelle de Bar, daughter of Theobald de Bar, seigneur de Pierrepont. John of Arkel was the "dearest foe" of William II, Duke of Bavaria.