Donat Henchy O’Brien was an officer of the Royal Navy. He was the son of a Royal Navy captain who claimed descent from an ancient Irish king. O’Neill served with the Mediterranean Fleet during the Napoleonic Wars. He left the Navy in 1821 and never returned to sea again.
About Donat Henchy O’Brien in brief

He is buried at St Pancras Cathedral, London, on the banks of the River Seine, where he was born in 1785 in County Clare, Ireland. He had a son, Michael, and a daughter, Hannah Henchy, who both served in the Navy and later became a judge advocate. He also had a step-son, John, who became a barrister and later a judge-general. He never married and died in 1883 in London, aged 80. He left the Navy in 1821 and never returned to sea again and died at age 80 in 1884 in London. His son Michael died in the Battle of Lissa, Italy, in 1811, aged 83. O’Neill served with the Mediterranean Fleet during the Napoleonic Wars.
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