Dorcas Blackwood, 1st Baroness Dufferin and Claneboye

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Dorcas Blackwood, 1st Baroness Dufferin and Claneboye (1726 – 8 February 1807), eldest daughter and co-heir of James Stevenson, of Killyleagh, County Down (by his wife Ann, daughter of General Nicholas Price), son of Hans Stevenson by his wife Anne, daughter and eventually sole heiress of James Hamilton, of Neilsbrook, County Antrim, the nephew and sole heir of James Hamilton, Viscount Clandeboye, father of James Hamilton, 1st Earl of Clanbrassil.