Garret Moore, 1st Viscount Moore

Garret Moore, 1st Viscount Moore PC (I) (c. 1564 - 9 November 1627) was an Anglo-Irish politician and peer.

Moore was the son of Sir Edward Moore of Mellifont and his wife Elizabeth Clifford (died 1581), daughter and co-heiress of Nicholas Clifford of Holme. Elizabeth had already been married three times, and all her husbands belonged to the Anglo-Irish nobility: her first husband, Sir William Brabazon, was Lord Justice of Ireland. Moore was thus the half-brother of Edward Brabazon, 1st Baron Ardee, and, through his mother's third marriage to Captain Humphrey Warren, he was also the half-brother of Sir William Warren.

He was invested as a knight in 1599 by Elizabeth I. He held the office of Seneschal of Cavan in 1601. He inherited his father's very substantial estates in 1602, (much of these were leasehold, held directly from the English Crown). He was a staunch friend of Hugh O'Neill, Earl of Tyrone, and hosted the negotiations that led to the Treaty of Mellifont in 1603 and the ending of the Nine Years' War.

His loyalty to the Crown was never seriously in doubt, despite his friendship with the Earl of Tyrone, but after Tyrone's flight to the Continent in 1607 he was the target of vehement attacks by his enemies, especially the volatile and unreliable Christopher St Lawrence, 10th Baron Howth, with whom he had quarreled bitterly, despite their being relatives by marriage. Howth accused Moore of treasonable dealings with Tyrone, and pressed the charges with such vigour that the Lord Lieutenant of Ireland, Sir Arthur Chichester, who had originally laughed at them as "too absurd even to charge a horse-boy with, let alone a knight", felt obliged to place Moore under house arrest. Moore admitted that on the eve of the Flight of the Earls, Tyrone had visited him at his home, Mellifont, but he firmly denied any imputation of treason. Howth, summoned before the Irish Council, refused to produce any evidence of the alleged treason, on the ground that since Moore was himself a Privy Councillor that body was clearly guilty of bias, while his bizarre claim that he had seen Moore try to raise the Devil did nothing to enhance his credibility. The case was transferred to England, and in due course Moore was cleared of all suspicion. Howth, undaunted, now accused Chichester and Moore of conspiring to murder him: the Council, which by now lost had all patience with him, ordered him to retire to his home in disgrace.

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