Phaedrig O'Brien, 17th Baron Inchiquin

Phaedrig Lucius Ambrose O'Brien, 17th Baron Inchiquin (4 April 1900 - 1982) was the holder of a hereditary peerage in the Peerage of Ireland, as well as Chief of the Name of O'Brien and Prince of Thomond in the Gaelic Irish nobility. He was a geologist.

The third of five children born to Lucius O'Brien, 15th Baron Inchiquin and Ethel Foster, and younger brother of Donough O'Brien, 16th Baron Inchiquin, he was also the uncle of the current incumbent, Conor O'Brien, 18th Baron Inchiquin. He was educated at Eton College and Magdalen College, Oxford where he graduated MA.

He briefly served in Britain in World War I, which ended before he would have gone on active service or been promoted, as a Gunner in the Royal Field Artillery.

O'Brien further studied at Imperial College London'sRoyal School of Mines, but worked in Kenya as a farmer and coffee planter from 1922 until 1936 when he was professionally engaged as a geologist in the mining industry by the Anglo-American Corporation of South Africa.

He left in 1939 to serve in World War II with the Rifle Brigade, being commissioned in 1940 as Second Lieutenant and rising to Major in 1943. He was attached to the East African Intelligence Corps in Somaliland, Ethiopia and Madagascar, was mentioned in despatches in 1941, as well as wounded.

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