Lord Buddha was a real person...
You have to remember not all of these key names in history were self-proclaimed gods. And considering most of the names of people where born and lived year before Jesus himself, I sincerely doubt that there will be any written records of these people. You also have to remember, the Bible wasn't written until years and years after Jesus was here.
In Ancient Egypt (I am sure you know this) the King/Pharaoh was considered to be a living god by his people. And was given that title - Horus comes up in Ancient Egyptian tales....in his story, he is the son of the last Pharaoh (his Uncle kills his father), and defeats his Uncle to gain title to the throne - and becomes King and the living representative god on Earth. The Ancient Egyptians believed that all of the Pharaohs were descendants of Horus himself.
Also these claims are not "blasphemous" as we are not all Christians....just a little reminder.
and that just you can't find one name doesn't mean the others are not legit.