With the Wars of the Roses period more popular than ever, it only makes sense to explain the actual claims to the throne of the warring sides, Lancaster and York. Who had the better claim? Eh, I guess that's up to you but I always say Lancaster! :) So then, let's explain Lancaster's (the rightful house after all) claim first then, shall we?
|Rose of Lancaster|
But what about the lancastrian, Henry Tudor? His claim came from his mother, Margaret Beaufort (though his grandfather, Owen Tudor, was said to have come from the line of Welsh royals, but that didn't account for much) Margaret Beaufort was the daughter of John Beaufort. This John Beaufort was the son of another John Beaufort who was an illegitimate son of John of Gaunt (as I mentioned above, John of Gaunt is the third surviving son of Edward III) Even though the Beauforts were legitimized by Richard II, some didn't take their claim seriously. So really Henry VII got quite lucky in taking the throne, since his claim was rather slim.
|Rose of York|
Just a side note, Richard of York's wife of Cecily Neville who, had some Beaufort blood in her too. But seeing as her royal blood comes Joan Beaufort, the youngest Beaufort child and a girl at that it didn't really count for anything.
So there's the claim from the warring sides of the Wars of the Roses, Lancaster and York. Hope that clears up any confusion if there ever had any :)