 She thereby was the sister of Count Peter I of Savoy (d. 1078), Count Amadeus II of Savoy (d. 1080), and Adelaide (d. 1079), consort of the German anti-king Rudolf of Rheinfelden.Still during the lifetime of Emperor Henry III, Bertha at the age of four was betrothed to Henry III's son, Henry IV (aged five) on 25 December 1055 in Zürich.Bertha was raised in Germany thereafter.