Commentary
Charles Cawley: "The origins of Humbert [I] "blancis manibus" Comte de Maurienne, first known ancestor of the counts of Savoy, are unproven. Alternative theories have been proposed:

1. Manteyer suggests that he was descended from Garnier Comte de Troyes, whose son Hugues may have received part of the county of Vienne, and whose own son Humbert has been postulated (probably incorrectly, see above) as the father of comte Humbert [I].

2. Previté-Orton prefers the theory of descent from the local family headed by Amédée Comte [de Belley], living in [977]. A link between these two groups of families is suggested by the various donations of property in the county of Belley made by Humbert [I] and his descendants.

3. descent from the first kings of Provence. This proposition is based only on a manuscript note written by d’Hozier in 1675, in a copy of Guichenon’s Histoire généalogique de la maison de Savoie later deposited at the Bibliothèque nationale in Paris, which states that "les chartes qui établissent la descendance de la Maison de Savoie des rois de Provence sont dans les Cartulaires de Saint-Maurice à Vienne". Presumably such alleged descent would be through Charles Constantin Comte de Vienne, son of Louis King [of Provence], about whose two sons nothing is known apart from their names. No reference to such charters is found in the commentary on the cartulary of Vienne Saint-Maurice published by Ulysse Chevalier, or in the handful of charters themselves which he published. It must be assumed that, if such documentation ever existed, it has since disappeared.

4. son of "Béraud". The book of anniversaries of the church of Aosta includes an entry dated 1040 the dating clause of which notes "regnante et principante in Valle nostra Augustæ Salassorum Umberto P. Maurianensi filio illustris Beroldi de Saxonia". This is the origin favoured by Guichenon after reviewing numerous alternative theories. In addition to "tradition" in the family, he bases his conclusion on an anachronistic heraldic argument and a supposed common connection with St Maurice. He identifies Béraud with "Berthold" who is named in two charters of Rudolf III King of Burgundy dated 1016 and 1018. Guichenon also launches into highly speculative conjecture about the precise origin of Béraud in the families of Widukind and Emperor Otto I which is not worth summarising. Assuming that the Aosta entry is factually correct (it is assumed that it is not contemporary), the reference to "Saxonia" may represent an imperfect transcription. It is therefore possible that Humbert was the son of a local "comte Béraud" who is otherwise unrecorded.

It is also possible that Humbert [I] was related to Ermengarde, second wife of Rudolf III King of Burgundy, who appointed him as her representative in administrative dealings relating to her territorial holdings after her husband died. If this is correct, the family relationship cannot be traced as Queen Ermengarde’s parentage is not known, although the fact that Humbert [I]’s possible sister was also named Ermengarde may indicate a family connection.
Family
ClaimDetailEvidence
SpouseAuzilia von Lenzburg (e977-) 
Child +Oddon de Maurienne Comte de Maurienne (~1017-1060) [S913] [S966]
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Attributes
ClaimDetailEvidence
GenderMale
NameHumbert I, Count of Maurienne [S966]
Nickname: Humbert Blancis Manibus (White Hands)
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NameHumbert , Comte de Maurienne [S913] [S966]
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NameHumbert I 'blancis manibus | of the White Hands' Comte de Mauienne [S899] [S966]
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TitleCount of Chablais [S899] [S966]
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TitleCount of Salmourenc [S966]
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Timeline
ClaimDateDetailAgeEvidence
Birth 970 - 975France [S966]
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Marriage 995 - 1000Auzilia von Lenzburg (e977-) [S899] [S966] [S3196]
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Title1018Count of Noyon [S966]
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Title1024Count of Aosta [S966]
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Title1034Comte de Maurienne [S966]
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Title1043Count of Maurienne [S899] [S966]
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Death 1047 - 1052 [S966]
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Death 1047 - 1051 [S966]
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Sources
IndexTitle
[S899] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - Swabian Nobility)" (2006-7 (v1.2 Updated 29 January 2007)) (https://fmg.ac/Projects/MedLands/SWABIAN NOBILITY.htm).
[S913] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - Northern Italy 1: 900-1000)" (2006-7 (v1.2 Updated 22 August 2007)).
[S966] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - Savoy)" (2006-7 (v3.0 Updated 24 May 2014)) (https://fmg.ac/Projects/MedLands/SAVOY.htm).
[S3196] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - Burgundy Kingdom: Genevois)" (https://fmg.ac/Projects/MedLands/burgkgenev.htm).