Lady Mary Victoria Douglas-Hamilton

Lady Mary Victoria Douglas-Hamilton, also known as Mary Victoria Hamilton (11 December 1850 - 14 May 1922) was a Scottish noblewoman who was the great-grandmother of Prince Rainier III of Monaco, Prince Karl Johannes von Schwarzenberg and Princess Ira von Fürstenberg, and the great-great grandmother of Albert II, Prince of Monaco.

First marriage
On 21 September 1869, Lady Mary Victoria married Hereditary Prince Albert of Monaco, only child and heir apparent of Charles III, Prince of Monaco. Their marriage was annulled by the Church on 3 January 1880, although civilly it was dissolved only on 28 July 1880

Issue

 * 1) Louis II, Prince of Monaco (12 July 1870 – 9 May 1949) married Ghislaine Dommanget but had no issue.

Second marriage
on 2 June 1880, she married Hungarian nobleman Count Tasziló Festetics

Issue

 * 1) Countess Mária Matild Georgina Festetics de Tolna (24 May 1881, – 2 March 1953) married Prince Karl Emil von of Fürstenberg]].
 * 2) Prince György Tasziló József Festetics de Tolna (4 September 1882,  – 4 August 1941) married Countess Marie Franziska von Haugwitz.
 * 3) Countess Alexandra Olga Eugénia Festetics de Tolna (1 March 1884 – 23 April 1963) married first to Prince Karl of Windisch-Grätz (brother-in-law of Archduchess Elisabeth Marie of Austria) then Prince Erwin of Hohenlohe-Waldenburg-Schillingsfürst,
 * 4) Countess Karola Friderika Mária Festetics de Tolna (17 January 1888 — 21 January 1951) married Baron Oskar Gautsch von Frankenthurn.

Titles and styles

 * 11 December 1850 - 21 September 1869 Lady Mary Victoria Douglas-Hamilton
 * 21 September 1869 - 3 January 1880 Her Serene Highness The Hereditary Princess of Monaco.
 * 2 June 1880 - 21 June 1911 Countess Festetics de Tolna.
 *  21 June 1911 - 14 May 1922 Her Serene Highness Princess Festetics de Tolna.