Jesus' Last Name?

Christ.

Christ is not Jesus’ last name. It may be confusing because we often see and hear Him referred to as Jesus Christ. It may be better understood (in English) as Jesus the Christ. Christ is an epithet of Jesus that means Messiah. Christ is the English version of the Greek word christos. The equivalent Hebrew term is messias, which in English, is Messiah. Both Christ and Messiah mean anointed or anointed one.  Jesus is the consecrated (set apart), anointed One. He is the Messiah.

Just some basic information we need to understand.