Otto III, Duke of Bavaria
Otto III of Bavaria , member of the Wittelsbach dynasty, was Duke of Lower Bavaria from 1290 to 1312 and disputably King of Hungary and Croatia between 1305 and 1307 as Bla V.
In January, 1279, Otto married Catherine, a daughter of Rudolph I of Germany and Gertrude of Hohenburg. Their twins, Henry and Rudolph, were born in 1280 and died the same year.
Source: Wikipedia