Irmgard of Berg
This article does not cite any sources. (December 2009) (Learn how and when to remove this template message)
She married in 1217 Henry IV, Duke of Limburg (since 1226), who became count of Berg in 1225. Henry IV of Limburg-Berg died on 25 Feb 1246; their descendants were counts of Berg, the county of Berg leaving the descendance of the Ezzonen.