Jesus was not a historical person. The myth was built on many "Joshua" characters. It was a common name among the Jews.
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Well, that argument has been around a long time. I don't think it's been proven or disproven. I listened to a really good audio book some time ago, where the prof did a historical analysis.
https://www.audible.com/pd/The-Historical-Jesus-Audiobook/B00DC8EQOI
I guess I would comment I liked the prof's method of analysis, but of course he could not prove or disprove this question, only cite the evidence and use analytic methods and such.