"For God so loved the World that he gave his only begotten son, so that whosoever believe in him will have everlasting life"
Despite the fact that 2 billion people worldwide believe that Jesus was a real person, who was born of a virgin, lived, prescribed laws, got up the nose of the Jewish Council, fell out of favor with his subjects, and then got nailed to a tree, there is no hard evidence that such a person existed. There are some passing references to people that may have been Jesus.
Some atheists consider discussion of the existence of a historical Jesus to be a red herring. They argue that, while a person named Jesus may or may not have existed, there is clearly no reason to believe that he had special powers, was the son of God, or performed miracles. Even if it could be firmly established that Jesus the man existed, this would not be evidence for the extraordinary claims that make up the foundation of the Christian religion.
"Jesus" is the anglicised version of the Latin Iesus, from the Greek Iesous, from the Aramaic Ieshua/Yeshua, from which we get the modern westernised name Joshua.
"Christ" is the anglicised version of the Greek word christos, which is a translation of the Hebrew word Mashiach (Messiah), meaning "[one who is] anointed". Contrary to the popular opinion, Christ isn't a reference to Jesus' family or surname in the modern western tradition. Christ refers to the state of being "annointed" (a common reference to being a teacher or priest or some form of authority). Many Christian sects refer to him as Christ Jesus.
More precisely, he should be referred to as Jesus the Christ. As a person, he is normally referred to as Jesus of Nazareth, although this obviously contradicts the tradition that Jesus was born in Bethlehem.