Gertrude of Süpplingenburg was Duchess consort of Bavaria from 1127 to 1138, Margravine consort of Tuscany from 1136 to 1139, and Duchess consort of Saxony from 1137 to 1138. From 1142 she was Margravine consort of Austria and again Duchess consort of Bavaria until her death. She was Regent of Saxony during the minority of her son in 1139-1142.