Origins of the names "Isa" and "Younes"

Arabian Christians call Jesus by the name of Yasu' (Similar to Yeshua) and call Jonah "Yonan" while Muslims call them "Isa" and "Younes". The question is did the monotheists of Arabia before Islam (Jews and Christians) use the names "Isa" and "Younes" or the names "Yasu'" and "Yonan" and if the latter was correct then how can we explain the Quran changing their spelling?. Were the names Yasu' and Yonan used later by Christians of the Levant who were arabized as a loanword?