A "manservant" is a person, usually a male, who works as a servant or helper to another person, specifically a man. They may assist with household chores, run errands, or provide any other type of personal service to their employer. Full definition
«There's one scene,» he says, about his starring role as a lifelong White House manservant in «The Butler,» «where I don't know what I was thinking. (orlandosentinel.com)
The plot can be described in one sentence: Mortdecai learns that a famous painting has been stolen and he goes to great lengths, with his bodyguard and loyal manservant Jock (played by Paul Bettany) to get it back. (lights-camera-jackson.com)