Agnes de Poitou
Agnes de Poitou was from the noble house of the de Poitou. She was born in 1020 to Comte, Duc Guillaume III de Poitou de Aquitaine and his wife Agnes de Bourgogne.
Agnes de Poitou was the second wife of Henry III, Holy Roman Emperor. Among their children were Judith of Swabia and Henry IV, Holy Roman Emperor.