Where does Sefaria get "Nazarene" from in the Talmud in Gittin 57a?

Question

Where does Sefaria get "Nazarene" from in the Talmud in Gittin 57a?

https://www.sefaria.org/Gittin.57a.4?lang=bi&with=all&lang2=en

אזל אסקיה [ליש"ו] בנגידא (לפושעי ישראל) א"ל מאן חשיב בההוא עלמא א"ל ישראל מהו לאדבוקי בהו א"ל טובתם דרוש רעתם לא תדרוש כל הנוגע בהן כאילו נוגע בבבת עינו

Onkelos then went and raised Jesus the Nazarene from the grave through necromancy. Onkelos said to him: Who is most important in that world where you are now? Jesus said to him: The Jewish people. Onkelos asked him: Should I then attach myself to them in this world? Jesus said to him: Their welfare you shall seek, their misfortune you shall not seek, for anyone who touches them is regarded as if he were touching the apple of his eye (see Zechariah 2:12).

I suppose that one issue with that translation is that Yeshu is not Yeshua(hebrew name for Jesus of Christianity), and Yeshu is an acronym for Ymach Shmoh VeZichroh, and (maybe?) not even a name, so could (perhaps?) refer to any heretic, so not necessarily Jesus..or the Jesus of Christianity, but that aside..

I don't see the word Nazarene in the Hebrew there

Has Sefaria just added "the Nazarene" into its translation when it's not in the/any hebrew version?

I'm aware of two versions of the Hebrew, one where raised Yeshu by necromancy, is censored to raised the "sinners of israel" by necromancy http://www.come-and-hear.com/gittin/gittin_57.html , while the oldest manuscript, the Munich Manuscript, has raised Yeshu by necromancy. Sefaria shows both in the hebrew, with censored in brackets, and uncensored outside of brackets. And its English is the uncensored, but it seems to add the word Nazarene, and I don't see that in the Hebrew.

Sefaria has bold for literal translation, and regular font for interpolation, and where they wrote Nazarene, they wrote it in bold. Even though I don't see that in the hebrew.

Answer 1

I can't tell you for sure where Koren (whence Sefaria) sourced its inclusion of "the Nazarene", but I can say that it is included in at least one manuscript of this passage. Namely, in the manuscript titled Vatican 130, we see:

אזל אסקיה לישו הנוצרי בנגידא

You can see a picture of the manuscript on Hachi Garsinan, part of the Friedberg Jewish Manuscript Society. I've reproduced the relevant part of the manuscript here: