Tidak terdapat sumber terpecaya yang ada dari nama istri-istri Herbert I. Banyak karya kedua yang menyebutnya sebagai Bertha de Morvois.[2] Dasar utamanya berasal dari Historia Walciodorensis Monasterii, sebuah catatan mengenai pendiri biara Waulsort, Ybert de Ribemont (Eilbertus, Elbertus), yang mencakup silsilah yang dbuat.[3][4] Mereka memiliki keturunan sebagai berikut:
^Ancestral Roots of Certain American Colonists Who Came to America Before 1700, Created by Frederick Lewis Weis, Continued by Walter Lee Sheppard, Jr., 8th Edition, 2004, Published by Genealogical Publishing, 50:16, 50:17
^Ancestral Roots of Certain American Colonists Who Came to America Before 1700, Created by Frederick Lewis Weis, Continued by Walter Lee Sheppard, Jr., 8th Edition, 2004, Published by Genealogical Publishing, 50:17
^Ancestral Roots of Certain American Colonists Who Came to America Before 1700, Created by Frederick Lewis Weis, Continued by Walter Lee Sheppard, Jr., 8th Edition, 2004, Published by Genealogical Publishing, 50:17, 50:18