It's not exactly that outlandish a claim. There are many people descended from the Quraysh tribe. It's as vapid a point as declaring yourself a descendent of Charlemagne. (I.E, everyone who has a white person in the last, say, 3 generations of their family tree.)
It's to be excpected that he probably is a descendent of Mohammed. It would be more strange if he wasn't. That's how geneology tends to work. Given enough time, eventually, everyone is your descendent... or noone is.
https://www.theguardian.com/science/com ... rutherford








