Irmgard was the daughter of unknown parents. The date and place of her birth have not been found.
Her husband was Adolf II (IV) von Berg, who she married in 1127. The place has not been found. Their five known children were Engelbert I (?-1189), Eberhard IV (<1150-1180), Friedrich II (c1120-1158), Bruno III (c1155-c1200) and Arnold (?-1190).
Note 1