Dorcas Blackwood, 1st Baroness Dufferin and Claneboye dating history

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Dorcas Blackwood, 1st Baroness Dufferin and Claneboye (born Dorcas Stevenson; 1726 – 8 February 1807) was the eldest daughter and co-heir of James Stevenson, of Killyleagh, County Down, and his wife Ann, née Price, daughter of General Nicholas Price. Her paternal grandparents were Hans Stevenson and his wife Anne, née Hamilton. Her grandmother was the second daughter and eventually sole heiress of James Hamilton of Neilsbrook, County Antrim. Her great-grandfather was the son of Archibald Hamilton, the next brother of James Hamilton, 1st Viscount Claneboye. Her great-grandfather became the sole heir of Viscount Claneboye when the 1st Viscount's grandson, Henry Hamilton, 3rd Viscount Claneboye, Baron Hamilton, and 2nd Earl of Clanbrassil, died in 1675 with no sons.