Iehoshua (which means H" saves) is a Jewish name. Iehoshua bin Nun, for example. Ieshua was a short form of Iehoshua and many Jews had that name during the Second Temple period.
Now, let's spell both names in Hebrew. Iehoshua is Yud, Hey, Vav, Shin, Vav, 'ayin. Ieshua, the short form is Yud, Shin, Vav, 'ayin. 'ayin is a difficult letter to pronunce and some people made it mute. Samaritans don't pronunce it, and probably Galilean Jews also dropped it. If you drop the 'ayin, then you have to drop the last non written vowel a. So Ieshu could easily have been the current pronunciation of Ieshua in northern Israel. But, the man named Ieshu in the Talmud, could never be the same as the Christian Jesus, because that Ieshu lived about 130 years earlier. He could simply have been any other man called Ieshua.