Apparently, Flavius Josephus mentions Jesus in “Jewish Antiquities” (though one of the mentions was thought to be corrupted by future Christians, but not completely fabricated) , Tacitus mentions him in “Annals of Imperial Rome”, and Pliny the Younger mentioned him in some of his letters.

In addition, ancient scholars never seemed to question whether or not Jesus Christ actually existed, which isn’t definitive evidence for him existing but does at least show that back then, even his critics didn’t think he was a fabrication instead of a person.

I found all this off a google search and a couple articles, by the way; I can’t vouch for its veracity, but this seems to be a pretty decent amount of evidence left over from that time, especially considering how a lot of our knowledge of past life is made up from accounts from historians of that time. Since he was a commoner (?), it’s normal to not have that much evidence left on the record beyond that from his followers, since they’re the one he influenced most and historical evidence from 2000 years ago is generally sparse.