First, the translation in Mark 14:61 is accurate. We find other such examples from the very earliest times. Christ (Greek) and Messiah (Hebrew) both mean anointed one, a title of Jesus.

• Matt 1:16 - and Jacob the father of Joseph, the husband of Mary, of whom was born Jesus, who is called Christ.
• Matt 1:17 - So all the generations from Abraham to David were fourteen generations, and from David to the deportation to Babylon fourteen generations, and from the deportation to Babylon to the Christ fourteen generations.
• Matt 2:14 - And when he had assembled all the chief priests and scribes of the people, he asked them where the Christ was to be born.
• Matt 11:2 - Meanwhile John heard in prison about the works of Christ, and he sent his disciples
• See also Matt 16:16, 20, 22:42, and many more.

Thus, Christ is a title, not a name. Jesus was His name and sometimes He was called simple, Jesus, or Christ or sometimes, Jesus Christ, and sometimes, Christ Jesus, etc.