Henry I the Long (c. 1065 – 27 June 1087), Margrave of the Nordmark, also Count of Stade (as Henry III), son of Lothair Udo II, Margrave of the Nordmark, and Oda of Werl, daughter of Herman III, Count of Werl, and Richenza of Swabia.
[1] There were no children as a result of this marriage, and Eupraxia, widowed, married next Henry IV, then King of Saxony, who became Holy Roman Emperor.
Raffensperger suggests that Henry's motivation in marrying Eupraxia was to bring Saxony closer to Kiev.
[2] In fact, the marriage may have been arranged by Oda of Stade, daughter of Lothair Udo I, Margrave of the Nordmark, who had married Sviatoslav II, Grand Prince of Kiev.
Upon his death, Henry was succeeded as margrave and count by his brother Lothair Udo III.