He was born in Wigtownshire, Scotland, immigrated at an early age with his parents, and settled in Carbonton, North Carolina.
He sat as Member of Parliament for Wigtownshire.
His son, the tenth Earl, represented Wigtownshire in the House of Commons as a Conservative and served as Lord Lieutenant of Ayrshire and Wigtownshire.
Following his defeat, McEacharn abandoned not only politics but Australia, leaving the country in 1905 and moving to Wigtownshire in Scotland, where he purchased the ancestral home of the Earl of Galloway.
Sir Andrew Agnew, 8th Baronet (1818–1892), his son, British MP for Wigtownshire 1856–1868
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Sir Andrew Agnew, 3rd Baronet (died 1702), Scottish MP for Wigtownshire 1685, 1689–1702
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Sir Andrew Agnew, 7th Baronet (1793–1843), British MP for Wigtownshire 1830–1837
As objects they are very easy to transport and a few have been found on Iona, Skye, Harris, Uist, Lewis, Arran, Hawick, Wigtownshire and fifteen from Orkney.
The area of Wigtown, the name of the relevant lieutenancy area of the Lord Lieutenant, encompasses not only the town of Wigtown, but of Wigtownshire.
Sir Patrick Agnew, 1st Baronet (c.1578–1661), Member of Parliament for Wigtownshire, 1628–1633 and 1643–1647
Having first pursued a career as a Writer to the Signet in Edinburgh, Robert William's interest in journalism was recognised by his Whig friend and patron the Earl of Stair, who in 1954 made him Editor of the Wigtownshire Free Press, the headquarters of which was based in Stranraer, to which the family moved from Edinburgh, remaining there until 1860.