Heribert was one of four siblings (brothers Udo, Konrad, Heribert; sister Judith).
Considerable controversy surrounds the paternity of these children. Graf Konrad son of Gebhard (died 982) and Graf Udo son of Gebhard (died 949) have both been proposed as their father, Jackman being the principal proponent of the former theory while Hlavitschka has written extensively in support of the latter. It is unnecessary to repeat the detailed arguments in support of each case, as they are fully set out elsewhere, and particularly because each has appeal and neither is obviously preferable. From a purely chronological point of view, the estimated birth date range of the daughter Judith does suggest more difficulty in sustaining the argument in favour of Graf Konrad being their father. The introduction of the name Heribert into the family suggests a strong family connection between these four siblings and the Vermandois family. ... [It] is suspected that the wives of Gebhard (died 949) and Udo son of Gebhard (also died 949) were daughters of Héribert I Comte de Vermandois. However, in neither case is it obvious that the four siblings ... were descended from these sisters. In the case of Gebhard, it appears difficult to identify his known son Konrad with Konrad who succeeded as duke of Swabia in 983, and ... it is chronologically hard to sustain that the siblings were the children of Gebhard's known son Konrad. In the case of Udo son of Gebhard, his known son Udo was recorded as bishop of Strasbourg so could not be the same person as Udo, one of the four siblings [named], who was killed in 982. All these reservations suggest that there may be a completely different explanation for the parentage of these four siblings from the two theories of Jackman and Hlavitschka.
Thietmar names "Conradus Suevorum ductor…eiusdem frater Heribertus comes" when recording their deaths. The fact that the two brothers must have also been brothers of Udo and Judith is demonstrated by Thietmar referring to "nepos meus Oddo et uxor eius Irmirgerd…" in 1018, and recording the death of "Gevehardus, Heriberti comitis filius, nepos meus" in 1016, both Otto and Gebhard being recorded elsewhere as the sons of Heribert.
Pfalzgraf in 959. Heinrich Archbishop of Trier confirmed the foundation of the church at Humbach at the request of "ducis Herimanni…Cuonradi comitis" by charter dated 959, witnessed by "…Hernbertes comes palatinus…". Graf im Kinziggau 976. "Otto…rex" donated property "in pago et in comitatu Nachgouue…Vuormacensis et …Spirensi" held "until now [hactenus]" by "Heribertus comes" to Kloster St Maximin at Trier by charter dated 29 May 992.
The necrology of Fulda records the death in 992 of "Heribraht com". 1
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