If you accept history at all and indeed any person at all existed in History, then these Names have the greatest proof.
Thus do we draw thought from this world or do we draw from God?
It is well known that history gets distorted. All you have to do is to compare any war history written by the opposing sides. Things like death statistics generally will favour the side doing the writing. The Bible has changed over time, as has some of the writings of Baha'u'llah. I can link you to some work on that subject, if you wish. That is if I can find it again.
In Hinduism, we draw directly from God. There is no intermediary like a 'manifestation' or a panel of 9 elected male judges.