His parentage is confirmed by the charter dated 29 Sep 1046 in which Milon [V] Comte de Tonnerre names some of his paternal ancestors “Milo atavus meus…Wuydo proavus meus…Milo pater meus…”.... The difficulty with this is the absence of "abavus" and “avus” from the series of ancestors. Bouchard suggests that the charter should be interpreted as indicating that Guy was the son of Milon [II]. This is probably correct, as shown by the following assessment of the chronology of the family. It is assumed that Milon [II] is identified as the “atavus” because of his mention in the document as founder of the monastery. It is likely that Milon [II] died during the 980s..., which would place his birth within the wide range of [910/40]. If this is correct, and if the birth date range of Milon [V] is correctly estimated..., Milon [V] would most likely have been in the fourth succeeding generation, and therefore the great-grandson of Milon [II]. The chronology therefore indicates that neither “atavus” nor “proavus” should be interpreted in this document with their traditional meanings of great-great-great grandfather and great grandfather.
The name of Guy's wife is not known. 2
Research Notes: