Viscount Cremorne

Earl of Dartrey, of Dartrey in the County of Monaghan, was a title in the Peerage of the United Kingdom. It was created in 1866 for Richard Dawson, 3rd Baron Cremorne.

Thomas Dawson, Burgess of Armagh, came from Yorkshire to Ireland during the reign of Elizabeth I. During the 1650s and 1660s, his second son, Richard, a Cornet in Cromwell's Cavalry, purchased thirty one townlands which formed the nucleus of the family's estates in Co. Monaghan. His only daughter and heiress, Frances, married her cousin Walter Dawson (died 1718) of Armagh who built Dawson's Grove, County Monaghan. Their son, Richard Dawson (died 1766), represented Co. Monaghan in the Irish House of Commons, becoming a Dublin banker and Alderman. He married Elizabeth Vesey, daughter of John Vesey, Archbishop of Tuam and Lord Justice of Ireland.

Richard and Elizabeth's third son, Thomas Dawson, also sat as Member of Parliament for County Monaghan from 1749 to 1768. In 1770, he was raised to the Peerage of Ireland as Baron Dartrey, of Dawson's Grove in the County of Monaghan, and in 1785 he was made Viscount Cremorne, also in the Peerage of Ireland. Both titles were created with normal remainder to the heirs male of his body. In 1797 (after his three sons had all predeceased him) he was created Baron Cremorne, of Castle Dawson in the County of Monaghan (some sources claim "of Dawson-Grove in the County of Monaghan"), in the Peerage of Ireland, with remainder to his nephew Richard Dawson, Member of the British Parliament for County Monaghan from 1801 to 1807. On Lord Cremorne's death in 1813 the barony of Dartrey and the viscountcy became extinct.

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