It was probably Mary. She would have known what he would become because Gabriel had told her and because she was still a virgin when Jesus was born.
Quote by: Jack
He lived in Nazareth.
2) Where was Jesus from his early teens to his late 20s? What did he do, where did he go? Why did no one record those years in the Bible?
And he came to Nazareth, where he had been brought up.
Luke 4:16 ESV
This explains why the people there were so surprised at his teaching.
And when Jesus had finished these parables, he went away from there, and coming to his hometown he taught them in their synagogue, so that they were astonished, and said, “Where did this man get this wisdom and these mighty works? Is not this the carpenter's son? Is not his mother called Mary? And are not his brothers James and Joseph and Simon and Judas? And are not all his sisters with us? Where then did this man get all these things?” And they took offense at him. But Jesus said to them, “A prophet is not without honor except in his hometown and in his own household.” And he did not do many mighty works there, because of their unbelief.
Matthew 13:53-58 ESV
Our existence begins at our conception. God sometimes speaks of people before they are born but that is because of his omniscience, not because they already had any existence.
According to the Bible, where were we before we were born? Were we who we are now? Were we sinful before birth as well as after?
We don't become guilty of sin until we reach the point of understanding the difference between right and wrong and choose to do what is wrong.