Gertrude of Dagsburg
Gertrude of Dagsburg (died 30 March 1225) was the reigning countess of Metz and Dagsburg (Dabo) between 1212 and 1225. She was duchess consort of Lorraine by her short-lived marriage to Theobald. She was also a trouvère composing poems set to music, which often revolved around tales of courtly love.
Her mother was Gertrude of Baden, and her father was of Albert II, count of Metz and Dagsburg (Dabo); she was his heiress.