I’m not sure if you are a historian, but that Jesus existed is exceedingly accepted by Christian and Athiest scholars [0]. I have no evidence of my family existing prior to the early 1900s due to records being destroyed during WWII. But there is plenty of evidence that Otto Van Bismarck existed from the same time period.
Even Santa Claus, who is fictional, is derived from the historical figure Saint Nicholas (with some obvious differences).
Even Santa Claus, who is fictional, is derived from the historical figure Saint Nicholas (with some obvious differences).
0 - https://en.m.wikipedia.org/wiki/Historicity_of_Jesus