One inscription said "Jesus, son of Joseph", another said "Mara", a common form of Mary, and another said "Yose", a common form of Joseph.
Only the most common names in the area at the time. I also doubt one would say “Jesus”, the Latin form of Yeshua.
Touche! You are correct. His real name was Y'shua. Jesus is the Latinized name of Iesu, the Greek version.