The name means "War like", "of war", "god of war", or "war". It most likely evolved from the Roman god of war, Mars. In the Underworld series, there is a vampire named Marcus. Marcus is one of the three leaders in the vampire form of government in the Twilight Saga. Marcus Lattimore is a famous NFL player.
― Anonymous User 6/17/2014
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Just thought you would like to know that the names Mark and Marcus have both Hebrew and Greek origins. Marcus is written this way in Greek: ΜάρκοςMarcus is written this way in Hebrew: מרקוסHitchcock's Bible Dictionary gives the meaning of Mark and Marcus as: polite; shiningSaint Mark the Evangelist (Hebrew: מרקוס; Greek: Μάρκος; 1st century), also known as John Mark, is traditionally believed to be the author of the Gospel of Mark and a companion of Saint Peter.