Actually in the New Testament, Matthew 1:4 and Luke 3:33. Not a Mormon term.
Well, Aminadab is a more fleshed-out character in the Book of Mormon. He’s got several lines of dialogue, e.g., 5:41 “And Aminadab said unto them: You must repent, and cry unto the voice, even until ye shall have faith in Christ, who was taught unto you by Alma, and Amulek, and Zeezrom; and when ye shall do this, the cloud of darkness shall be removed from overshadowing you.”