Maria Carolina Anna, or Caroline, Countess Thun (19 May 1769 – 1800)[8] married 16 October 1793 an Anglo Irish aristocrat, Lord Gillford, better known as Richard Meade, 2nd Earl of Clanwilliam (10 May 1766 – 3 September 1805), son of Theodosia Meade, Countess of Clanwilliam.[12] The marriage caused a rift with her husband's protestant Irish Ascendancy family.[13]
She "excelled as a singer and guitarist".[14]
They had issue,
1. one son Richard Charles Francis Christian Meade, 3rd Earl of Clanwilliam, and two daughters
2. Caroline, Countess Széchenyi de Sárvár-Felsővidék (1794–1820) and
3. Selina, Countess von Clam-Martinic (1797–1872) who married back into the Austrian aristocracy.[15]