What is the masculine form of feminine word maid?

In English there are no masculine or feminine forms. English uses gender specific nouns for male or female.

The noun maid is the Word for a female servant.

There is no corresponding noun for a male who keeps house or takes care of the wardrobe of the lady of the house.

Keep in mind that these gender specific nouns came about when the roles for males and females were separate. Today a person hired to keep house or clean house could be a male and a person hired to tend the yard and gardens could be a female.