At http://weekly.ahram.org.eg/Print/5368.aspx … the lost pharaoh of dynasty 16 (update). It seems there was an independent dynasty at Abydos contemporary with the Hyksos, and the 17th dynasty, located in the south, at Thebes. Some 16 royal tombs of the Abydos dynasty have been found – adjacent to earlier MK tombs (dynasty 12 and 13). A cedar beam from the tomb of Sobekhotep O was reused in the new found tomb – so postdates early dynasty 13. However, controversy rules. One professor of archaeology at Cairo University thinks the new pharaoh belonged to dynasty 13 – a successor of Sobekhotep I. Seems reasonable.