The plural form of manservant is manservants or, and a menservant is a man who performs duties as a servant in a private house. A manservant is usually the head servant of a household. A manservant can have many different roles as someone who works in a home or familial environment.
He could be a butler, party man, sommelier, and he has charge of the table. He could be a footman, which is a man employed as a servant in a large establishment, such as a palace. He runs errands and does chores. He could also be a valet. The chief role of the valet is to act as a personal attendant to his employer.