King of Britannia, The Celts and The Scots!
I believe awhile back he also said he was also a direct descendent of the Israelite Priestcraft so he was actually "both a king and a priest".
Psssst...Dave! So am I....
Yes, you are probably descended from royalty. So is everyone else.
"You are of royal descent, because everyone is.
You are of Viking descent, because everyone is. You are of Saracen, Roman, Goth, Hun, Jewish descent, because, well, you get the idea. All Europeans are descended from exactly the same people, and not that long ago. Everyone alive in the tenth century who left descendants is the ancestor of every living European today, including Charlemagne, and his children Drogo, Pippin, and, of course, not forgetting Hugh.
If you’re broadly eastern Asian, you’re almost certain to have Genghis Kahn sitting atop your tree somewhere in the same manner, as is often claimed.
If you’re a human being on Earth, you almost certainly have Nefertiti, Confucius, or anyone we can actually name from ancient history in your tree, if they left children. The further back we go, the more the certainty of ancestry increases, though the knowledge of our ancestors decreases. It is simultaneously wonderful, trivial, meaningless, and fun." Excerpted from A Brief History of Everyone Who Ever Lived by Adam Rutherford.