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This is unlikely to be truly historical: "They may descend from one Hiallt, a Norseman who settled in the Cotentin and founded the village of Hialtus Villa (Hauteville) from which the family takes its name." It would be more interesting if we were told the date of the genealogical work that invented a "Hiallt" from an etymology of "Hialtus Villa". Thirteenth century? Fourteenth century? --Wetman 15:23, 20 May 2006 (UTC)
Sadly, the French Wikipedia gives none. Srnec 21:56, 26 May 2006 (UTC)
Hiallt is a Scandinavian given name ? The Hauteville family is not necessarily of Scandinavian origin. It is believed that the Hauteville were a family of (Anglo-)Saxon origin. Tancred is a given name of Saxon origin (Dankrad, Tankrad), unknown among Western Franks. In Medieval Normandy, the name Tancred was also unknown. The Hauteville were descendants of Saxons (from Germany) or/and Anglo-Saxons (from (Great) Britain) who had settled in northwest French coast between AD 300 (see Saxon Shore) and 1000 (Scandinavians from the Danelaw, together with some Anglo-Saxons settled in Normandy).-184.108.40.206 (talk) 20:44, 28 November 2015 (UTC)