 Montaner Frutos also mentions a donation from Queen Urraca years later, in 1115, when she donated properties to Toledo Cathedral and only mentions one Isabel as the king's wife.On 25 November 1093 Alfonso VI contracted a third marriage with Berta, although in a document dated 13 April 1094 she is not mentioned as would have been the custom at that time.For onomastic reasons, the genealogist Szabolcs de Vajay suggested that she was a member of the House of Savoy, daughter of Count Amadeus II of Savoy, niece of Bertha of Savoy (wife of Henry IV, Holy Roman Emperor), great-granddaughter of Bertha of Milan and first-cousin of another Bertha (who married King Peter I of Aragon and Navarre).