Brunswick River is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in the South West region of Western Australia

Western Australia

Western Australia is a state of Australia, occupying the entire western third of the Australian continent. It is bounded by the Indian Ocean to the north and west, the Great Australian Bight and Indian Ocean to the south, the Northern Territory to the north-east and South Australia to the south-east...

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The river rises in the Darling Range then flows south west discharging into the Collie River

Collie River

The Collie River is a river in the South West region of Western Australia.The river was named after Dr Alexander Collie who, along with Lt. William Preston, was the first European explorer to find the river in 1829....

 near Australind

Australind, Western Australia

Australind is a satellite town and outer northern suburb of Bunbury, Western Australia, and is located 12 km north-east of Bunbury's central business district. Its Local Government Area is the Shire of Harvey. At the 2006 census, Australind had a population of 8,717. -History:Prior to European...

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The river was named in 1830 by Governor James Stirling

James Stirling (Australian governor)

Admiral Sir James Stirling RN was a British naval officer and colonial administrator. His enthusiasm and persistence persuaded the British Government to establish the Swan River Colony and he became the first Governor and Commander-in-Chief of Western Australia...

 after Ernest Earnest Augustus

Ernest Augustus I of Hanover

Ernest Augustus I was King of Hanover from 20 June 1837 until his death. He was the fifth son and eighth child of George III, who reigned in both the United Kingdom and Hanover...

 (Hanover) Duke of Brunswick-Lunenburgh and King of Hanover

Kingdom of Hanover

The Kingdom of Hanover was established in October 1814 by the Congress of Vienna, with the restoration of George III to his Hanoverian territories after the Napoleonic era. It succeeded the former Electorate of Brunswick-Lüneburg , and joined with 38 other sovereign states in the German...

. The Duke had been a passenger in 1813 aboard the HMS Brazen when Stirling had been Captain.

The Brunwick has six tributaries

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

; Wellesley River, Ernest River, Elvira Gully, Augustus River, Frederic River and Lunenburgh River.