The Theory of Uno Mas doesn't have a strong support in my opinion, because the idea that there was one wizard to begin with doesn't completely make sense to me. If he created the first wand and was the first wizard while living with dinosaurs, he must have lived millions of years and survived whatever brought dinosaurs to extinction. Not only that, he would have to have survived up until humans became evolved enough to mate, in which he would have to teach any half-blood offspring with magical abilities he birthed unto the world how to use magic, and teach them about wands. He would have to have children very likely of passing on magical abilities, leading to a high chance of inbreeding, to create as many wizard-born families as there are. Also, that would make pure-bloodedness an impossibility, given that no matter how many generations are created, there is still at least 1 muggle in your original bloodline. To get a strong wizard bloodline, did "Uno" even resort to breeding with his offspring. I don't like this theory at all, or the inbreeding it strongly suggests. One thing I do understand is muggle-borns probably had a distant ancestor who was part-wizard from Uno that had their bloodline strongly intermingled with muggles, possibly over multiple occasions merging with other similarly washed-out wizarding blood lines, but many other theories make much more sense. I mean, before Homo-sapiens there was a wizard capable enough to understand his magical abilities enough to make a wand to hone them? Not so much, thank you.