Halfdan Sigfrid Of+ Jutland 
Halfdan Sigfrid Of+ was born about 0750. Halfdan Sigfrid Of+'s father was Harold+ Hilditonn. His paternal grandfather is Rurik+ Sligeband. He was an only child. He died in 0800.General Notes
SOURCES: "Ancestors/Descendants of Royal Lines" (Contributors: Manuel Abranches de Soveral, Reynaud de Paysac, F.L. Jacquier <Justin Swanstrom>, H.R. Moser <Burke Peerage>, L. Orlandini, O.Guionneau, L.B. de Rouge, E. Polti, A.Terlinden <Genealogy of the existing British Peerage, 1842>, L. Gustavsson, C. Cheneaux, E. Lodge, and S. Bontron <Brian Tompsett>) http://geneastar.org.
"Neuman-Smith-Goodale Family and Ancestors" Michael R. Neuman michaelneuman@@earthlink.net.
He had a biological son named Hemming De+.