There is no proof that Bruno von Braunschweig was the son of Ekbert "der Einäugige" but this appears probable in view of the names which are common to the two families and also the common references to the Derlingau. Bruno is shown in Europäische Stammtafeln as the brother of Wichmann [III] Graf im Duffelgau and Ekbert Graf im Derlingau, while another table shows Wichmann [III] as son of Ekbert. His birth date range is estimated from his estimated marriage date. The estimated birth date ranges of both Wichmann [III] and Bruno are consistent with their having been brothers. Bruno founded Braunschweig. He was a candidate for the German throne in 1002 in opposition to Heinrich IV Duke of Bavaria, who was elected as Heinrich II King of Germany.
Bruno married Gisele VON SCHWABEN, Duchess of Swabia, daughter of Hermann I VON SCHWABEN, Duke of Swabia, and Gerberga DE HAUTE-BOURGOGNE, between 1003 and 1005. (Gisele VON SCHWABEN was born on 11 Nov 990 in Schwaben, Bayern and died on 16 Feb 1043 in Goslar, Niedersachsen.)
Sources
1 Foundation for Medieval Genealogy, Medlands: Bruno.