At the alleged time of jesus, that name was as common as Tom, Dick and Harriet today. For hundreds of years archeologists and grave robbers have been unearthing ossuaries labelled "jesus" and thought nothing of it.
Here is another good look at the problem of josephus and the predeliction the later xians had to try to subject their mythical man to reality, or reality to their mythical man;
"Josephus was also a Jewish historian who penned voluminous works on Jewish history. Two of his most renowned works were the ‘Antiquities of the Jews’ and ‘The Jewish Wars.’ From these works it is plain to see that despite his desire for self-preservation, he was a very proud and devout Jew. Before we begin to examine the two alleged references to Jesus which appear in his work entitled ‘Antiquity of the Jews’ (90CE~94CE), it is both relevant and necessary to note that within his ‘Antiquities of the Jews,’ he made mention of approximately twenty different people named Jesus. Some of these characters included Jesus the son of Sapphias, Jesus the son of Gamala, Jesus the son of Phabet, Jesus the son of Sie, Jesus the son of Fabus, Jesus the son of Thias, Jesus the son of Gamaliel, Jesus the son of Damneus, Jesus the brother of Onias, Jesus the brother of John, Jesus the Galilean, who was a great military commander, and numerous others."
From:
https://michaelsherlockauthor.wordpress.com/2014/11/26/josephus-the-jesus-forgeries/