Overview
Gertrude of Northeim (also Gertrude of Nordheim) ( – after 1154/before 1169), was a German noblewoman and regent.
She was the daughter of Henry, Margrave of Frisia. Gertrude was heiress of Bentheim and Rheineck. She married first Siegfried I of Weimar-Orlamünde and then Otto I, Count of Salm. She was regent of the County of Weimar-Orlamünde during the minority of her son Siegfried II of Weimar-Orlamünde in 1113-1115, and regent of the County of Bentheim on behalf of her daughter Sophia in 1150.
Life
Gertrude was born around 1090. She was the daughter of Henry, Margrave of Frisia and Gertrude of Brunswick. Gertrude had two full siblings: Otto III of Northeim, who succeeded her father, and Richenza, who married the future Emperor Lothair II. From her mother’s second marriage, to Henry I, Margrave of the Saxon Ostmark, Gertude also had a half-brother, Henry II, Margrave of Meissen.
From Wikipedia (CC BY-SA 4.0).