Ко се венчао Berthold IV, Duke of Zähringen?

Berthold IV, Duke of Zähringen (c. 1125 – 8 December 1186) was a Duke of Zähringen and Rector of Burgundy. He was the son of Conrad I, Duke of Zähringen and Clementia of Luxembourg-Namur. He founded numerous cities, including Fribourg.

Ida of Boulogne (c. 1160–1216) was suo jure Countess of Boulogne from 1173 until her death.