Commentary
Charles Cawley: "The wife of Guigues [VII] is named Beatrix in secondary sources but the primary source which confirms that this is correct has not yet been identified. Her origin has been the subject of considerable controversy. The Vita Margaritæ Albonensis comitissæ records that the son of Marguerite de Viennois married "Imperatore…consanguineam". The Aymari Rivalli De Allobrogibus records that "Guigo tertius" married "neptem…primi Federici imperatoris". Chorier’s Histoire de Dauphiné names her Beatrice di Monferrato, daughter of Guglielmo V Marchese di Monferrato & his wife Judith of Austria, stating that her parentage is confirmed by letters from Emperor Friedrich I, dated 1168, addressed to "Guigoni Dalphino" which refer to her as "filia Guillelmi comitis Montisferrati". This document has not been found in a search of the MGH compilation of diplomas of Emperor Friedrich. Usseglio suggests that Chorier’s hypothesis is based on a misinterpretation of a charter of Emperor Friedrich II, dated Mar 1238, which is addressed to "Beatricis filiæ quondam Guillelmi Marchionis Montisferrati" (who was the daughter of Guglielmo VI Marchese di Monferrato, and widow of Dauphin André), and confirms privileges granted to Dauphin Guigues [VII] in 1155. The family connections of Emperor Friedrich I are so numerous that it does not seem worthwhile to speculate on Beatrix’s correct parentage. According to Europäische Stammtafeln, Beatrice married secondly Enrico Marchese di Caretto. However, the only primary source which suggests this second marriage appears to be the late 13th/14th century Vida of the poet Raimbaut de Vaqueiras which describes her as sister of Bonifazio Marchese di Monferrato and states that she married "Enric del Caret". However, Raimbaut de Vaqueiras himself calls her "filha del marques" in the famous 'Carros', 'Truan, mala guerra', composed in [1200/01], which emphasises her youth, which seems to suggest that the Beatrice in question must have been the daughter not sister of Marchese Bonifazio. A marriage with Dauphin Guigues would therefore be chronologically impossible."
Family
ClaimDetailEvidence
SpouseGuigues VII, Comte d’Albon (e1122-1162) 
Child +Beatrix de Viennois, Countess of Albon (1161-1228) [S3198]
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Attributes
ClaimDetailEvidence
GenderFemale
NameBeatrice [S1007]
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NameBeatrix [S3198]
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Timeline
ClaimDateDetailAgeEvidence
Birthest 1129 (1121-1137)
 
Marriageabt 1155Guigues VII, Comte d’Albon (e1122-1162) [S1007]
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Sources
IndexTitle
[S1007] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - Burgundy Kingdom: Nobility)" (v1.2 Updated 16 December 2007) (https://fmg.ac/Projects/MedLands/BURGUNDY Kingdom.htm).
[S3198] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - Burgundy Kingdom: Viennois)" (https://fmg.ac/Projects/MedLands/burgkvien.htm).