Engelbert III, Margrave of Istria'la kim evlendi?

Engelbert III (died 6 October 1173), a member of the Rhenish Franconian House of Sponheim, was Margrave of Istria from 1124 until his death.

Matilda of Sulzbach (died 31 October or 3 November 1165) was Margravine of Istria by marriage to Engelbert III of Istria. Different dates of death are given in the necrologies of Baumburg Abbey and two monasteries of Salzburg.