Mohammed was a fake character designed to be the focus point of the Arabian religion. No independent reliable witness ever saw him. He is strictly imaginary. The hadith writers gave him a physical description and some dialogue centuries after he supposedly bit the dust but they got it from their imaginations. There was no one named "Jesus" until 1631 AD. If you don't like that dating system then think of it as being 388 years ago. That is how long the Jesus character has existed. You can call him Potato Head before then but his name was not Jesus in the original fairy tale.