Mieszko II Lambert
He was the son of the Lotharingian Count Palatine Ezzo (955–1043) and his wife Matilda of Germany, Countess Palatine of Lotharingia (979–1025), a daughter of Emperor Otto II and his consort Theophanu. He was a member of the Ezzonian dynasty. Herman's younger brother Otto became Duke of Swabia in 1045; among his sisters were Richeza, who married the Polish King Mieszko II Lambert, and Theophanu, Abbess of Essen.