She is named as wife of Letaud in the latter's charter dated [12 Apr] 935, which also names both his and her parents. Manassès Comte de Dijon & his wife Ermengarde are the only contemporary noble couple with these names which has so far been identified in the region.... 1
Marriage Information:
Ermengarde married Cte Letaud (Leotold) I DE MÂCON, son of Vcte Aubry I DE NARBONNE, comte de Mâcon, and Tolana DE MÂCON. (Letaud I DE MÂCON was born in 915 in Mâcon, Saone-et-Loire, Bourgogne, France and died on 3 Nov 961 in Mâcon, Saone-et-Loire, Bourgogne, France.)
Sources
1 Foundation for Medieval Genealogy, Medlands: Ermengarde.