Wenceslaus I of Bohemia
After the death of Constance in 1243 Henry took as his second wife Agnes (d. 1268), a daughter of King Wenceslaus I of Bohemia, and in his third marriage the daughter of a "ministerialis", or serving knight, Elisabeth von Maltitz, who bore him Friedrich Clem (whose only daughter Elisabeth married Otto II, Prince of Anhalt-Aschersleben) and Hermann the Long.