Burke's Peerage: Queen Elizabeth II Descended from the Prophet Muhammad
This is connected to just pointing out that having ancestors named Hussein is more common among Europeans and Americans than is usually realized. Elizabeth II can't be descended from the Prophet Muhammad without also being descended from his grandson, the original Husayn / Hussein, since that is the line of descent of the Sayyids.
(UPI - 10 Oct 1986)
...Brooks-Baker said the British royal family is descended from Mohammed through the Arab kings of Seville, who once ruled Spain. By marriage, their blood passed to the European kings of Portugal and Castille, and through them to England's 15th century King Edward IV. '
Wouldn't this also make GWB a decendent of Mohammed too? Somewhere out there a wingnut is having a skywalker: