Emperor Lothair of Lotharingia I of the Romans

  General Notes:

He was the Emperor of the Romans, co-ruling with his father until 840, and the King of Bavaria (815 Italy (818 and Middle Francia (840 The territory of Lothringen (Lorraine in French and English) is named after him.

Lothair was the eldest son of the Carolingian emperor Louis the Pious and his wife Ermengarde of Hesbaye, daughter of Ingerman the duke of Hesbaye. On several occasions, Lothair led his full-brothers Pippin I of Aquitaine and Louis the German in revolt against their father to protest against attempts to make their half-brother Charles the Bald a co-heir to the Frankish domains. Upon the father's death, Charles and Louis joined forces against Lothair in a three year civil war (840 The struggles between the brothers lead directly to the breakup of the Frankish Empire assembled by their grandfather Charlemagne, and laid the foundation for the development of modern France and Germany.
http://en.wikipedia.org/wiki/Lothair_I

Lothair married Ermengarde of Tours, daughter of Count Hugh of Tours and Unknown, in Oct 821 in Diedenhofen, , Lorraine, FRA. (Ermengarde of Tours died on 20 Mar 851.)