Matilda of Hainaut (29 November 1293 – 1331) was the Princess of Achaea from 1313 to 1318. She was the daughter of Isabella of Villehardouin and her husband Florent of Hainaut. In 1299, while still a child, she had been married to Guy II de la Roche, Duke of Athens. Widowed in 1308, she was engaged to Charles of Taranto until 1313, when she remarried to Louis of Burgundy, who held the titular dignity of the long-extinct Kingdom of Thessalonica. The marriage was intended to unite the Angevin and Burgundian houses. So was the betrothal of the Empress Catherine II to Hugh V of Burgundy, Louis's elder brother. However, Charles of Valois, Catherine's father, nixed the marriage and instead married her to Philip of Taranto. It was in an effort to compensate the Burgundians that Philip renounced h