Yose is said to be a unique or rare form of the name Joseph - the inference being it is only known as being used for the brother of Jesus Christ. No one is saying it is a rare form.
Why does this have to be the brother of the Jesus in the tomb? He could just as easily be the father. Why label Jesus "son of" if the father is not in the tomb? And if Yose is the brother why was his box not label as Yose bar Yehosef.
And I suppose the unmarked boxes contain Simon and the sisters - after all we don't know their names so they must be the sisters