Bertha of Rheinfelden Countess of Bregenz (c.1065-c.1133) (1065–1128) Parents Adelaide of Savoy Rudolf of Rheinfelden Children Adelheid von Bregenz Rudolf I, Count of Bregenz Siblings Agnes von Rheinfelden Berthold I, Duke of Swabia Adelaide of Rheinfelden Tetberga Partners Ulrich X, Count of Bregenz