Merriam-Webster Collegiate Dictionary - majordomo

 noun  (plural -mos)  Etymology: Spanish mayordomo or obsolete Italian maiordomo, from Medieval Latin major domus, literally, chief of the house  Date: 1589  1. a head steward of a large household (as a palace)  2. butler, steward  3. a person who speaks, makes arrangements, or takes charge for another; broadly the person who runs an enterprise the ~ of the fair