Ulf Tostesson
He was the brother of Sigrid the Haughty , and his son , Ragnvald Ulfsson , a jarl , was the father of Stenkil , who was elected king when the old House of Munsö died out . 
<triplet> Ragnvald Ulfsson <subj> Stenkil <obj> child <triplet> Stenkil <subj> Ragnvald Ulfsson <obj> father