Is your surname Wroten, Rothen, Roten, Rotin, Roden or any of the many versions of that sounding name? "Rotenu", is the name the Egyptians gave to the tribes living near the Dead Sea, who were the children of Lot "Lotan". Lot was the nephew of Abraham. In the bible, in the "Book of Numbers", there are many names like this. It is rather tedious but it's worth looking through, you might get clues.
Suellen Ocean is the author of Secret Genealogy II, Uncovering the Jewish Roots of Our Christian Ancestors, available at Amazon, B&N and Ocean-Hose.