Gissur Teitsson
He was the father of Ísleifur Gissurarson and the grandfather of Gissur Ísleifsson , who served as the first two bishops of Iceland . 
<triplet> Ísleifur Gissurarson <subj> Gissur Ísleifsson <obj> child <triplet> Gissur Ísleifsson <subj> Ísleifur Gissurarson <obj> father