JOHN (1290-c. 1320)  , surnamed the Parricide, and called also John of Swabia, was a son of Rudolph II. count of Habsburg and Agnes daughter of Ottakar II. king of Bohemia, and consequently a grandson of the German king Rudolph I . Having passed his early days at the Bohemian court, when he came of age he demanded a portion of the family estates from his uncle, the German king Albert I . His wishes were not gratified, and with three companions he formed a plan to murder the king . On the 1st of May 1308 Albert in crossing the river Reuss at Windisch became separated from his attendants, and was at once attacked and killed by the four conspirators . John escaped the vengeance of Albert's sons, and was afterwards found in a monastery at Pisa, where in 1313 he is said to have been visited by the emperor Henry VII., who had placed him under the ban . From this time he vanishes from history . The character of John is used by Schiller in his play Wilhelm Tell .