Why is British Columbia called "BRITISH" Columbia?

Answer 1

British Columbia

Province (pop., 2003 est.: 4,146,600), western Canada. It is bounded by Yukon Territory, Northwest Territories, Alberta, the Pacific Ocean, and the U.S. (including Alaska). The province has an area of 364,764 sq mi (944,735 sq km), and its capital is Victoria. The area was inhabited by indigenous peoples, including Coast Salish, Nootka, Kwakiutl, and Haida. It was visited in 1578 by Sir Francis Drake and in 1778 by Capt. James Cook, who was searching for the Northwest Passage. Capt. George Vancouver surveyed the coast (1792–94), and overland expeditions were made by several explorers, including Alexander Mackenzie and Simon Fraser. The British and Americans contended over Vancouver Island for years, until it was recognized as British and made a crown colony in 1849. The mainland became the colony of British Columbia in 1858; with the colony of Vancouver Island, it joined Canada in 1871 as the province of British Columbia. The province now has a prosperous economy based on diverse sources, including logging, mining, agriculture, and shipping.

Answer 2

Canada was a colony of Great Britain.

It is the same reason why the six small states in the Northeast of the US are referred to as New England.