Gertrude of Saxony, also known as Gertrude Billung, was a countess of West-Frisia by marriage to Floris I, Count of West-Frisia, and countess of Flanders by marriage to Robert I, Count of Flanders. She was regent of Holland in 1061-1067 during the minority of her son Dirk V, and regent of Flanders during the absence of her spouse in 1086–1093.
- Occupation
- politician
- Position held
- regent
- Citizenship
- County of Flanders, Duchy of Saxony, County of Holland
- Born
- 1030
- Died
- August 3, 1113
