'The Ascendancy of Ermengarde of Tonnerre: Part II ...
The family of Ermengardis (no 5 [from a previous post: where she is identified as "Ermengardis (Ermengarde), widow of Herbert IV of Vermandois" and wife of "Milo (Milon) IV, count of Tonnerre"]), widow of Herbert, not the reverse, is not « Bar-sur-Seine » ([a] misunderstanding [of a] hypothesis of E. Petit : such a dynasty does not exist at this time). She was, I think, the daughter of Alberic II of Macon and his second wife.'