Short answers, pulled from the story.
The Hebrew word mashiach means anointed and comes from a verb describing rubbing with oil. The Septuagint translated this term into Greek as khristos which gave us the English title Christ.
A future Jewish king must descend from King David through Solomon. He will unify the tribes of Israel and gather all Jews back to Eretz Israel while rebuilding the Temple in Jerusalem.
Sunni Muslims believe Jesus was taken up to Heaven without crucification. Sura 4 verses 157 and 158 state he was neither killed nor crucified.
Sabbatai Zevi claimed to be Jewish Messiah across Ottoman Empire territories before converting under duress to Islam. He became known as history’s second most famous false messiah.
Emperor Haile Selassie I of Ethiopia became messiah figure for Rastafari movement. Followers cite bloodline from King Solomon and titles like Conquering Lion of tribe Judah.