Question: When was William Patrick Stuart-Houston's mother born?

Context paragraphs:
William Patrick Stuart-Houston: William Patrick "Willy" Stuart-Houston ("né" Hitler; 12 March 1911 – 14 July 1987) was a British nephew of Adolf Hitler who worked in Germany and later emigrated to America in 1939.  Born to Adolf's brother, Alois Hitler, Jr. and his first wife, Bridget Dowling, in Liverpool, England, William Hitler later moved to Germany, but subsequently emigrated to the United States, where he served in the United States Navy in World War II.

Roman Waschuk: Roman Waschuk (also Roman Vashchuk, ukr.: Роман Ващук), (born 1962 in Toronto, Ontario), ethnic Ukrainian, Canadian diplomat, Ambassador of Canada to Ukraine.  His parents immigrated after the Second World War to Canada.  His father was born in Ivano-Frankivsk, his mother born in Buchach.  He studied history with focus on Central and Eastern Europe, also German and Russian, receiving 1985 a MA at University of Toronto.  He worked for the Commission of Inquiry on War Criminals Juli 1985 – December 1986, Providing background information to investigators and counsel on WW2-era events in Central, Eastern and Southern Europe.  He is fluent in English, French, German, Russian, Ukrainian, Polish and Serbian.  He was member of the Ukrainian Scouting organization "Plast" in Canada.

W. P. Auld: William Patrick Auld (27 May 1840 – 2 September 1912), usually known by his initials or as "Pat" or "Patrick", was an Adelaide, South Australian vigneron and wine merchant born in Stalybridge (near Manchester, England), the son of Patrick Auld (1811 – 21 January 1886) and Eliza Auld (née McKinnell, 1806 – 8 July 1873).

Patrick Syring: William Patrick Syring, who uses his middle name, Patrick, (born August 30, 1957 in Toledo, Ohio), is a retired American career diplomat who was convicted of threatening and violating the civil rights of James Zogby, the Arab-American president and founder, and other senior employees, of the Arab American Institute during the 2006 Lebanon War.  Syring pleaded guilty to the charges June 12, 2008, was sentenced to one year in prison July 11, 2008, and was released early, in January 2009.

William Patrick Adam: William Patrick Adam, CIE, DL (14 September 1823 – 24 May 1881) was a British colonial administrator and Liberal politician.  He was twice First Commissioner of Works under William Ewart Gladstone and also served briefly as Governor of Madras between 1880 and 1881.

Bridget Dowling: Bridget Elizabeth Hitler, née Dowling (alternative Brigid) (3 July 1891 – 18 November 1969), was Adolf Hitler's sister-in-law via her marriage to Alois Hitler, Jr..  She was the mother of Alois Hitler's son William Patrick Hitler.  She was born and raised in Dublin, Ireland.

James Sandford (rugby union): William Patrick James Sandford (born 27 January 1989) is a rugby union player with Aviva Premiership side London Welsh.  Born in Richhill, County Armagh Northern Ireland, Sandford attended The Royal School, Armagh.  Having captained the Ulster Schools and Irish schools in his second year in those squads he was named Northern Bank Schools player of the year and subsequently joined the Ulster Academy.  In 2009 he was awarded National Young Player of the Year by the Irish Examiner.  On leaving school he represented Ulster U20's captaining the side and Irish U20's where he was involved in two Under 20's Six Nations campaigns and one IRB Junior World Championship.

William P. Lawlor: William Patrick Lawlor (September 17, 1854 – July 24, 1926), known as William P. Lawlor, was an associate justice of the California Supreme Court from January 3, 1915, to July 25, 1926.

Bill Feldman: William Patrick "Bill" Feldman (born 22 February 1958) is a former Australian politician.  Born in Kingaroy, Queensland, Feldman was a police officer before entering politics, having attained the rank of sergeant in 1994.  On 7 May 1978 he had married Gail, with whom he has two children, Dannielle and Luke.

William P. Connery Jr.: William Patrick Connery Jr. (August 24, 1888 – June 15, 1937) was a United States Representative from Massachusetts.  He was born in Lynn on August 24, 1888, the son of William P. Connery Sr. and brother of Lawrence Joseph Connery.  He attended St. Mary’s School at Lynn, Collège de Montréal in Canada, and the College of the Holy Cross.  He entered the theatrical profession as an actor.  He also was a theater manager.  During World War I he enlisted as a private in the One Hundred and First Regiment, United States Infantry, and served nineteen months in France.  He was an electric company employee, he engaged in the manufacture of candy, and was secretary to the Mayor of Lynn.

Supporting paragraphs: Bridget Dowling William Patrick Stuart-Houston
Answer: 3 July 1891