patron

One that supports, protects, or champions someone or something, such as an institution, event, or cause; a sponsor or benefactor.

A customer, especially a regular customer.

The owner or manager of an establishment, especially a restaurant or an inn of France or Spain.

A noble or wealthy person in ancient Rome who granted favor and protection to someone in exchange for certain services.

A slave owner in ancient Rome who freed a slave without relinquishing all legal claim to him.