William II, Count of Henneberg-Schleusingen

William II of Henneberg-Schleusingen was the second husband of Catherine of Hanau. She was the oldest daughter of Reinhard II, Count of Hanau and his wife Catherine of Nassau-Beilstein and had earlier been married to Count Thomas II of Rieneck. William II and Catherine were engaged on 17 May 1432. She signed away her legal claims against the County of Rieneck in June 1432, in exchange for 8000florins. From William, she received a dowry of 16000florins, which were secured by the district and castle of Mainberg, near Schweinfurt.