Hanoverian a. : Of or pertaining to Hanover or its people, or to the House of Hanover in England.

Hanoverian n. : A native or naturalized inhabitant of Hanover; one of the House of Hanover.

Example:
Can you help me find information on Winnetou, a 1994 Black Hanoverian Stallion?

Taxonomy
American Hanoverian Society, The American, Hanoverian horse, breeders, AHS members, Hanoverian horses, Mares, breeding, banner advertising, Society, Inc, non-profit association, preservation, the North, North American continent, classified ads, Gotthard, Approved Stallions, Hanoverian.

Defination from the web:
Nonprofit corporation dedicated to breeding and promotion.