Background
She was the daughter of Henry IV, Holy Roman Emperor, and Bertha of Savoy.
She was the daughter of Henry IV, Holy Roman Emperor, and Bertha of Savoy.
Her maternal grandparents were Otto, Count of Savoy, and Adelaide of Susa. Her brother was Henry V, Holy Roman Emperor.
In 1079, aged seven, Agnes was betrothed to Frederick, a member of the Hohenstaufen dynasty. At the same time, Henry IV invested Frederick as the new duke of Swabia.