Bertha (died after 1014) was the wife of Arduin of Ivrea. She was thus margravine of Ivrea and queen of Italy (1002-1014).
Her parentage is unknown, but she is often said to be identical with Bertha of Milan, who was a member of the Obertenghi dynasty. Other scholars suggest that Bertha may have been the daughter of Hubert of Tuscany[1] or of Amadeus (son of Anscar II)[2]
Bertha intervened in eight of Arduin's royal diplomas,[3] in which she was often called his consors regni (royal consort).[4]
C. Dionisotti, Le famiglie celebri medioevali dell' Italia superiore (Turin, 1887), accessible online at archive.org
D. Carutti, Il conte Umberto (Biancamano) e il re Ardoino. Ricerche e documenti (Rome, 1884, 2nd ed., first published 1878), accessible online at: archive.org