John Parricida, or John the Parricide or Johann Parricida, also called John of Swabia (born ca.
1290, died December 13, 1312 or 1313, probably at Pisa) from the House of Habsburg, is a son of Rudolf II, former Duke of Austria and Agnes, daughter of King Ottokar II Přemysl of Bohemia.
Consequently, he is a grandson of both King Ottokar II and King Rudolph I of Habsburg.
By killing his uncle King Albert I of Germany he foils the first attempt of the Habsburg dynasty to install a hereditary monarchy in the Holy Roman Empire.