Gertrude of Dagsburg

[1] Her mother was Gertrude of Baden, and her father was of Albert II,[3] count of Metz and Dagsburg (Dabo); she was his heiress.

Gertrude succeeded her father as countess on his death in 1212, by which time she had already married Theobald, soon to be Duke of Lorraine (1213), according to the Vitæ Odiliæ.

On her marriage her husband took over the administration of her inheritance, but he died in early 1220 without siring any children, leaving her a widow.

[4] In May 1220 she married Theobald IV of Champagne, who was only an adolescent, against the wishes of the Emperor Frederick II.

One, Un petit devant le jour, is found in multiple sources, some with accompanying musical notation.