Ezzo, sometimes called Erenfried, (born about 955; died March 21, 1024), count palatine of Lotharingia, was the son of Hermann (died 996), also a count palatine in Lotharingia who governed in several shires along the Rhine (Bonngau, Eifelgau, Zulpichgau and Auelgau).

Having married Matilda (died 1025), a daughter of the emperor Otto II, Ezzo became prominent during the reign of his brother-in-law, the emperor Otto III (b 983; d 1002). His power was increased due to the liberal grant of lands in Thuringia and Franconia which he his wife received out of Ottonian possessions. Otto's successor, the emperor Henry II, was less friendly towards the powerful count although there was no serious trouble between them until 1011; some disturbances in Lotharingia quickly forced the emperor to come to terms, and Ezzo's assistance was purchased with additional imperial fiefs.

After this, the relations between Henry and his vassal appear to have been satisfactory. Very little is known about Ezzo's later life, but we are told that he died at a great age at Saalfeld on the 21st of March 1024. He left three sons and seven daughters:
• Hermann († 1056), archbishop of Cologne from 1036 to 1056;
• Ludolf († 1031), commander of the army of the archbishop of Cologne;
• Otto († 1047), succeeded in the office of count palatine until 1045, when he switched the palatinate for the duchy of Swabia;
• Richeza († 1063), queen of Poland, married with King Mieczyslaw of Poland († 1034).
• the others 6 daughters became abbesses, most of them in imperial abbeys or monastries.

Ezzo founded the Brauweiler Abbey near Cologne, the place where his marriage had been celebrated. It was dedicated in 1028 by Piligrim, archbishop of Cologne. Ezzo and his wife were buried at Brauweiler.