Elle est mariée avec Hendrik Lord Vane-Tempest van Wynyard.
Ils se sont mariés le 25 avril 1799 à Londen , elle avait 21 ans.
Enfant(s):
Anne Katherine Mac Donnell, Countess of Antrim was born on 11 February 1778.
She was the daughter of Sir Randal William Mac Donnell, 1st and last Marquess of Antrim and Hon. Letitia Morres.
She married, firstly, Sir Henry Vane-Tempest, 2nd Bt., son of Sir Henry Vane and Frances Tempest, on 25 April 1799 at Hanover Square, Mayfair, London, England.
She married, secondly, Edmund McDonnell on 24 May 1817 at Bruton Street, London, England.
She died on 30 June 1834 at age 56 at Park Lane, Mayfair, London, England, without male issue.
She was buried on 7 July 1834 at St. James's, Westminster, London, England.
Her will was probated in August 1853.
Anne Katherine Mac Donnell, Countess of Antrim succeeded to the title of 2nd Countess of Antrim [I., 1785] on 29 July 1791, suo jure.
She succeeded to the title of 2nd Viscountess Dunluce [I., 1785] on 29 July 1791, suo jure.
From 25 April 1799, her married name became Vane-Tempest. From 24 May 1817, her married name became Phelps.
http://thepeerage.com/p2834.htm#i28333
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