^Pálsson, Hermann. "The Sami People in Old Norse Literature." Nordlit 3.1 (2012): 29-53. "The following nouns were used about people of mixed parentage:".."halftroll 'a half troll'. This is used as the nickname of Hallbjorn of Ramsta in Namdalen, father of Ketill hoengr, and ancestor of some of the settlers of Iceland, including Skalla-Grimr."