William III of Baux
The title had come to the House of Baux through a brother , Raimbaut of Orange , of William III's paternal great-grandmother , Tiburge de Sarenom , the latter also referred to as Tiburge princess of Orange . 
<triplet> Raimbaut of Orange <subj> Tiburge de Sarenom <obj> sibling <triplet> Tiburge de Sarenom <subj> Raimbaut of Orange <obj> sibling