Sorry...
The questions remain unanswered in reference to his last name. If Ben-Pandira is not it...THEN WHAT IS IT? Is it your contention that he had no last name? Even though Yeshu was a common name?
Also...
Talmud and Tosefta
Occurrences Of Yeshu
The earliest undisputed occurrences of the term Yeshu are found in five very brief anecdotes in the Babylonian Talmud and Tosefta:
Yeshu ben Pandera, cited as the teacher of a second century CE heretic (Chullin 2:22-24, Avodah Zarah 16b-17a)
A sorcerer who had been stoned in Lod on the eve of one Passover. (Sanhedrin 43a)
An example of a "son who burns his food in public" (Sanhedrin 103a, Berakhot 17b) identified as Manasseh of Judah son of Hezekiah in a corresponding account in the Shulchan Arukh.
An idolatrous former student of the early first century BCE rabbi Yehoshua ben Perachiah. (Sanhedrin 107b).