John Dunlop Millen was an Irish

Ireland

Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...

-born Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

n politician. Born in Derry

Derry

Derry or Londonderry is the second-biggest city in Northern Ireland and the fourth-biggest city on the island of Ireland. The name Derry is an anglicisation of the Irish name Doire or Doire Cholmcille meaning "oak-wood of Colmcille"...

, he migrated to Australia as a child and was educated at the University of Sydney

University of Sydney

The University of Sydney is a public university located in Sydney, New South Wales. The main campus spreads across the suburbs of Camperdown and Darlington on the southwestern outskirts of the Sydney CBD. Founded in 1850, it is the oldest university in Australia and Oceania...

, becoming an engineer and mine manager in Tasmania

Tasmania

Tasmania is an Australian island and state. It is south of the continent, separated by Bass Strait. The state includes the island of Tasmania—the 26th largest island in the world—and the surrounding islands. The state has a population of 507,626 , of whom almost half reside in the greater Hobart...

. In 1919, he was elected to the Australian Senate

Australian Senate

The Senate is the upper house of the bicameral Parliament of Australia, the lower house being the House of Representatives. Senators are popularly elected under a system of proportional representation. Senators are elected for a term that is usually six years; after a double dissolution, however,...

 as a Nationalist

Nationalist Party of Australia

The Nationalist Party of Australia was an Australian political party. It was formed on 17 February 1917 from a merger between the conservative Commonwealth Liberal Party and the National Labor Party, the name given to the pro-conscription defectors from the Australian Labor Party led by Prime...

 Senator for Tasmania. In 1931, the Nationalist Party became the United Australia Party

United Australia Party

The United Australia Party was an Australian political party that was founded in 1931 and dissolved in 1945. It was the political successor to the Nationalist Party of Australia and predecessor to the Liberal Party of Australia...

, which Millen duly joined. He held his Senate seat until 1937, when he was defeated. He became a company director, and died in 1941.