The Chronicon Montis Serreni names "Machtildem" as daughter of "Ekkehardo marchioni" & his wife and names her husband "Tidericus comes". 1
Marriage Information:
Mathilde married Dietrich VON WETTIN, Graf in Eilenburg..., son of Gf. Dedo I VON MERSEBURG and Thietburga VON HALDENSLEBEN. (Dietrich VON WETTIN died on 19 Nov 1034.)
Sources
1 Foundation for Medieval Genealogy, Medlands: Mathilde.