 Complete the following phrase:  Rudolf II was born in Rheinfelden, Swabia, the youngest son of Count Rudolf of Habsburg and his first wife Gertrude of Hohenberg to survive infancy. In 1273 his father was elected king of Germany, the first of the Habsburg dynasty, whereafter he seized the princeless duchies of Austria, Styria and Carinthia from the Bohemian king Ottokar II. After King Ottokar was defeated and killed in the 1278 