If that were all there was to it, it wouldn't be worth calling attention to it. My belief is that this is a different family, but the combination of names does seem unlikely enough to justify the attention.
Very few people doubt that Jesus was a historical person, and nobody can discount his importance, so if these are relics of the man and his family, they deserve close scrutiny. Look at the attention the Shroud of Turin has received over the centuries.
While we're on the subject, does the "Jesus" ossuary actually contain any bones? If there's one historical fact about Jesus that almost everyone can agree upon, it's that he was crucified by the Romans. The bones ought to show evidence of that, if they're for the right man.
And if the box is empty...