Henry III, Holy Roman Emperor
Sviatoslav married his second wife, Oda of Stade, in about 1065, according to Dimnik. Oda, the daughter of Lothair Udo I, Margrave of the Nordmark, was in some way related to Henry III, Holy Roman Emperor. She gave birth to Sviatoslav's fifth son, Yaroslav, who later became prince of Murom and Chernigov. After Sviatoslav's death, Oda and her son moved to the Holy Roman Empire.