Pepin first appears in 834 as a count to the north of the Seine and then appears as same again in 840. In that year, he supported Lothair I against Louis the Pious.
Pepin's wife is unknown, but his heir inherited much Nibelungid territory and so historian K. F. Werner hypothesised a marriage to a daughter of Theodoric Nibelung. Their children were:
^ 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
^ 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
^ 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