Patrick Alexander Agnew of Dalreagle (1765–1813) was the first Military Governor of British Ceylon in Trincomalee.
A descendant of his was Sir Patrick Dalreagle Agnew KBE (1868 – 1925), Indian Administrator and Officiating Judge, Chief Court Punjab.
He was Deputy Adjutant General to Lord Cornwallis (1792), and later Chief of Staff to the Commander at the capture of Ceylon.
As a Lieutenant Colonel he commanded the force to put down the Polygar rebellion (1801) for which he was commended by Lord Clive.
Two years later he was recalled to London to account for the mutinies against the introduction of the new turban, which he is said to have recommended.