Nobility. He was born the youngest son of Albrecht II, Duke of Austria and Johanna von Pfirt who died two weeks after his birth. He married Viridis Visconti in 1365 who bore him four children. After the death of his father, he and his brother Albrecht stood under the regency of their oldest brother Duke Rudolf IV. When he came of age he received the reign over Tyrol. He died in the Battle of Sempach.