Irchaimbert, seigneur de Grandson - Correcting the Grandson tree

Is there any reason not to align this tree with Cawley’s article at FMG / Medlands?

http://fmg.ac/Projects/MedLands/burgkvaud.htm#_Toc50992889

The ancestry of Adalbert de Grandson and Lambert de Grandson, ancestors of the two branches of the seigneurie de Grandson, is not known. Gingins-La-Sarraz identifies Lambert as the “dernier comte laïque du Pays-de-Vaud” (Lambert [II] Comte [de Vaud]), noting that, having fallen into disgrace, Rudolf III King of Burgundy in 1011 deprived him of his county which he granted to the bishop of Lausanne (no source cited)[1110]. Gingins-La-Sarraz’s suggestion appears impossible from a chronological point of view: Comte Lambert is named between [1001/02] and 1018, whereas the sons of Lambert de Grandson survived well into the 12th century. Charrière names “Adalbert et Lambert auteurs de deux branches de [la] famille [de Grandson]” as sons of Comte Lambert [II], recording in later passages the descendants of Adalbert as “la branche aînée” and of Lambert as “la branche cadette”[1111]. While a close relationship between the Vaud and Grandson families is indicated by both using the names Lambert and Adalbert, the chronology suggests that Lambert de Grandson belonged to a later generation than Adalbert (in another passage Charrière names Lambert “neveu du sénieur Adalbert”[1112]). For presentational purposes, they are shown below as possible uncle and nephew. Lambert’s descendants are recorded as “seigneur de Grandson” from [1110/11], suggesting a family agreement with the descendants of Adalbert to share the seigneurie. No trace of such agreement has been found.

Two possible brothers:

• 1. ADALBERT de Grandson ([before 1025?]-after 27 Sep 1049). … Adalbert is named as father of Othon, Conon and Rigaud in the [1075/87] charter quoted below. [see below, SEIGNEURS de GRANDSON (line of ADALBERT).]
• 2. [--- de Grandson .] m ---. One child:
  • a) LAMBERT de Grandson [see below, SEIGNEURS de GRANDSON (line of LAMBERT)].

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Notes:

• Cawley does not support this profile (Irchaimbert, seigneur de Grandson (960-1026) at all that I can see.
• not listed at Bernard Andenmatten: "Grandson, de", in: Historical Dictionary of Switzerland (DHS), version of 15.10.2009. Online: https://hls-dhs-dss.ch/en/articles/019569/2009-10-15/, consulted on 24.11.2022.
• Marlyn Lewis, Ancestry of Elizabeth of York.< link > “Hirchinbert married Ilderude. Hirchinbert died circa 983. Child: Lambert I, Seigneur de Grandson+ d. 1026” https://our-royal-titled-noble-and-commoner-ancestors.com/p527.htm#...
• No citations for Geni’s current parents, Arnold l, comes & Mathilde d'Ardenne, princesse d'Ardenne et comtesse de Chiny or current brother, Godefroy de Chiny, premier comte d'Orchimont
• Current sons are Lambert I, sire of Grandson & Adalbert de Grandson, "Adalgold" dit "de la Sarraz"

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Tagging Sharon Doubell who worked on Adalbert de Grandson, "Adalgold" dit "de la Sarraz"