William Barcelona of Ausona, Count of Ausona, was born 1028 to Berengar Raymond I de Barcelona (1005-1035) and Guisla of Lluca (?-?) and died after 1054 of unspecified causes. Notable ancestors include Charlemagne (747-814). Ancestors are from France, Belgium, Germany.
William succeeded his father as Count of Ausona (initially with his mother as regent), but resigned in favour of his half-brother after almost 20 years in office. There is no sign of a wife or children.

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