Conservator

n.	1.	One who preserves from injury or violation; a protector; a preserver. The great Creator and Conservator of the world. - Derham.
	2.	(Law) An officer who has charge of preserving the public peace, as a justice or sheriff. The lords of the secret council were likewise made conservators of the peace of the two kingdoms. - Clarendon. The conservator of the estate of an idiot. - Bouvier. Conservators of the River Thames a board of commissioners instituted by Parliament to have the conservancy of the Thames.

Noun	1.	conservator - the custodian of a collection (as a museum or library) Synonyms: curator
	2.	conservator - someone appointed by a court to assume responsibility for the interests of a minor or incompetent person

CONSERVATOR. A preserver, a protector.
     2. Before the institution of the office of justices of the peace in England, the public order was maintained by officers who bore the name of conservators of the peace. All judges, justices, sheriffs and constables, are conservators of the peace, and are bound, ex officio, to be aiding and assisting in preserving older.
     3. In Connecticut, this term is applied to designate a guardian who has the care of the estate of an idiot. 5 Conn. R. 280.

curator, custodian, keeper, steward