August 9 – James of Castile, son of Alfonso X (b. 1268) August 10 – Tekuder, Mongol ruler of the Ilkhanate (b. 1246) August 19 – Alphonso, English nobleman and heir (b. 1273) August 30 – Ichijō Sanetsune, Japanese nobleman (b. 1223) October 16 – Shams al-Din Juvayni, Persian ruler and vizier November 9 – Siger of Brabant, Dutch philosopher (b. 1240) Al-Mansur II Muhammad, Ayyubid ruler of Hama (b. 1214) Ibn Kammuna, Arab Jewish philosopher and writer (b. 1215) Irene Komnene Palaiologina, Byzantine princess (b. 1218) Isa ibn Muhanna, Mamluk ruler, commander and prince John de Derlington, English archbishop and theologian Kaykhusraw III, Seljuk ruler of the Sultanate of Rum References