In the "Skáldskaparmál" section of his "Prose Edda" Snorri brings in the ancient king Halfdan the Old who is the father of nine sons whose names are all words meaning "king" or "lord" in Old Norse, as well as of nine other sons who are the forefathers of various royal lineages, including "Yngvi, from whom the Ynglings are descended". But rather oddly Snorri immediately follows this with information on what should be four other personages who were not sons of Halfdan but who also fathered dynasties, and names the first of these again as "Yngvi, from whom the Ynglings are descended". In the related account in the "Ættartolur" "Genealogies" attached to "Hversu Noregr byggðist", the name "Skelfir" appears instead of "Yngvi" in the list of Halfdan's sons.