Thorolf Skallagrímsson
He is brother of Egill Skallagrímsson and oldest son of Skallagrím Kveldulfsson and Bera Yngvarsdóttur . 
<triplet> Egill Skallagrímsson <subj> Skallagrím Kveldulfsson <obj> father <triplet> Skallagrím Kveldulfsson <subj> Egill Skallagrímsson <obj> child