Colonel William Blakeney (1735 – 2 November 1804) was an Irish British Army officer and politician.
He was born the son of MP John Blakeney and was the brother of Robert, John and Theophilus Blakeney.
He sat in the Irish House of Commons for Athenry from 1781 to 1783 and again from 1790 to 1800.
He was the father of Edward Blakeney
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