|Duke of Lorraine|
|Died||11 November 1048 (aged 47–48)|
|Father||Gerhard IV of Metz|
Adalbert (1000 – 11 November 1048 in Thuin) was the Duke of Upper Lorraine from 1047 until his death the next year. He was the first son of Gerhard IV, Count of Metz, and Gisela (Gisella), possibly a daughter of Theodoric I, Duke of Upper Lorraine. Gerard's father Adalbert had inherited the county of Metz from his brother Gerhard of the Moselle.
Gothelo I, Duke of Lower Lorraine and Upper Lorraine, died in 1044 and was succeeded by his son Godfrey III in Upper Lorraine but was refused Lower Lorraine. Irritated, Godfrey rebelled in that same year and devastated his suzerain's lands in Lower Lorraine. He was soon defeated and Adalbert named in his place in Upper Lorraine. Godfrey continued to fight for all Lorraine and Adalbert died in battle against him at Thuin on 11 November 1048. He had no known sons, and Henry III, Holy Roman Emperor immediately nominated his brother Gerhard to succeed him.
|Ancestors of Adalbert, Duke of Lorraine|
- In 1960, Szabolcs de Vajay hypothesized that Adalbert was count of Longwy and father-in-law of William VII of Aquitaine and William I, Count of Burgundy. (Annales de Bourgogne, Vol 32 (1960) 258-261), and has been followed in this by Frederick Lewis Weis, Ancestral Roots of Certain American Colonists Who Came to America Before 1700, Line 144-22. However, de Vajay subsequently published an unqualified retraction of his hypothesis in "Parlons encore d'Etiennette" in Onomastioque et Parente dans l'Occident medieval (Prosopographica et Genealogica, no.3), K. S. B. Keats-Rohan and C. Settipani, eds. (2000), pp. 2-6.