Let me explain the question.
The Jews consider Moses and Abraham their main prophets, and they pronounce those two names in the same way that those names were said during their lifetime. So if a Rabbi goes into a time machine and jumps out back in those olden days, then sees Moses and yells 'He ya Moses' , Moses would have turned around since he recognized his own name. Same goes for Muslims, 'Yo Mohammed!', and he probably would at least register that someone is calling him. (in the texts they pray from the names remain how it was then, unchanged, I assume, and not Anglicized).
But if a Christian from an English speaking country would hypothetically travel back in a time machine , and see Jesus with followers walking away, and yell out 'Yo, Jesus', or 'Mr. Christ? Jesus Christ?' chances are that Jesus would not turn around, since that was nothing like the name he used. He had a name Yahushua ben Yosef that he was called by everyone around him I assume.
He never said that I am a man with no name or every name. And the word Christos or Christ, is that even a word in a language that was spoken in Bethlehem at the time or when an apostle said 'You are the Christ' , and we assume 'You are the' was in whatever language they spoke (Hebrew or Aramaic) , so that means a completely different word was used instead of 'Christ' in that phrase, making Jesus Christ to be a name as similar to the original as 'Jukka the Wise' for example.
So my question is,
what makes Christians be certain that their prayers go to the right individual since they are not invoking the name (either Jesus or Christ) that was used during his every day interactions with the apostles, followers, family, friends, coworkers, etc. and the name he, himself introduced himself as?