About William de Hamilton
"Historians have ascribed various origins to this family. Hector Boece, followed by Buchanan and other writers repeating each other, gave rise to the legend that the Hamiltons were descended from the Earls of Leicester, and the chief historian of the House, somewhat feebly and with misgivings, also takes this view. But he himself supplies evidence to the contrary, and it cannot be denied that the narratives as to the first of the Hamiltons in Scotland are either mutually contradictory or can easily be refuted on chronological and genealogical grounds. One argument for descent from the great house of Leicester was that the armorial bearings of the Hamiltons, three cinquefoils, were a variation of the single cinquefoil of the Leicester family. It is, however, pointed out by a recent writer that this argument would also hold good for a descent from the Northumbrian family of the Umfravilles, who likewise bore a single cinquefoil. The possibility of a Northumbrian origin had been suggested by an earlier writer, Mr. John Liddell, and the above armorial statement may tend to corroborate his theory, which is so far justified by the fact that there was a place named Hamilton in Northumberland. It belonged to the Umphravilles. The names of various persons named Hameldon or Hamilton are found at any early date in Northumberland and on the borders of Scotland, although no evidence has been found of any connection with the Lanarkshire family. These facts give plausibility to the theory of Northumbrian origin, although it must be admitted that these alleged origins are but legends or theories, and are, as yet, without any satisfying evidence to support them. So far as record or charter evidence is available, the first undoubted ancestor of the Hamiltons was Walter Fitz Gilbert . . . ." (James Balfour Paul, The Scots Peerage (1907), 339-40, citations omitted).
Maximilian von Liechtenstein, 1/7/2017:
According to the source "The Norman People and Their Existing Descendants in the British Dominions and the United States of America" (1874) Gislebert, Lord of Blosseville (now Blouville), Normandy, in 1086 is the last assumed ancestor of William de Hamilton. Taking into account that this argument is made by referencing contemporary sources, I wonder why the link has not been made in Geni. Of course the link to Gislebert is not entirely certain, but then again at that period in time we cannot really be completely certain of anything. So if it represents the best working hypothesis, why not include it in Geni?
Maximilian von Liechtenstein