Omni verse 12 states:
Behold, I will speak unto you somewhat concerning Mosiah, who was made king
'Mosiah' or 'Moshiah' is Hebrew and literally means 'Savior'. The same word which has typically been translated into 'Messiah' in English. There also seems to be a Hebrew wordplay here. I may be on thin ice since I'm no expert and I haven't read this anywhere else, but if "made king" is translated from the Hebrew word for anointed it would be 'Maschiach', a very similar word. "Moshiah who was maschiach".