Peerage Record – 9550

     Hans Blackwood, 3rd Baron Dufferin and Claneboye was born in October 1758.² He was the son of Sir John Blackwood, 2nd Bt. and Dorcas Stevenson, Baroness Dufferin and Claneboye.² He married, firstly, Mehetabel Hester Temple, daughter of Robert Temple, on 19 June 1784.² He married, secondly, Elizabeth Finlay, daughter of William Henry Finlay and Mary Ann Stear, on 8 July 1801.³ He died on 18 November 1839 at age 81.³
     He held the office of Member of Parliament (M.P.) for Killyleagh [Ireland] from 1799 to 1800.² He held the office of Commissioner of Audit [Ireland] between 1813 and 1832.² He succeeded as the 4th Baronet Blackwood, of Ballyleidy, co. Down [I., 1763] on 8 August 1836.² He succeeded as the 3rd Baron Dufferin and Claneboye of Ballyleidy and Killyleagh, co. Down [I., 1800] on 8 August 1836.

     Georgette Ansay was born on 8 September 1916. She is the daughter of Herbert Ansay and Lucienne Legrand. She married Ferdinand Alois Andreas Josef Anton Maria Prinz von und zu Liechtenstein, son of Eduard Viktor Maria Prinz von und zu Liechtenstein and Olga Gräfin von Puckler und Limpurg, on 19 December 1968.
     Her married name became von und zu Liechtenstein.

     Christopher Richard Francis Graf von Rietberg was born on 8 May 1926.¹ He was the son of Ferdinand Alois Andreas Josef Anton Maria Prinz von und zu Liechtenstein and Shelagh Salome Houston Brunner.¹ He married Kathleen Hamilton Mahan, daughter of Alfred Thayer Mahan, on 17 September 1955.¹ He died on 15 November 2005 at age 79.²
     He was also known as Graf von Rietberg.¹ He lived in 2003 at The Bays, Chapel Lane, Crawley Down, Sussex, England^G.¹

     Kathleen Hamilton Mahan was born circa 1930.² She was the daughter of Alfred Thayer Mahan.^1,2 She married Christopher Richard Francis Graf von Rietberg, son of Ferdinand Alois Andreas Josef Anton Maria Prinz von und zu Liechtenstein and Shelagh Salome Houston Brunner, on 17 September 1955.¹ She died on 6 November 1982 at London, England^G.
     Her married name became von Rietberg.

     Alfred Thayer Mahan was born in 1840. He died in 1914.
     He wrote the book The Influence of Sea Power upon History, 1660-1783, published 1890. He lived at Blauvelt, Rockland County, New York, U.S.A.^G.¹ He lived at Orangeburg, Rockland County, New York, U.S.A.^G.

     Gabrielle Catherine Gräfin von Rietberg was born on 13 January 1957.¹ She is the daughter of Christopher Richard Francis Graf von Rietberg and Kathleen Hamilton Mahan.¹ She married Paul Lucas on 30 November 1999.¹
     From 30 November 1999, her married name became Lucas.¹ She lived in 2003 at The Old Rectory, Hale, Hampshire, England^G.¹

     Mark Andreas Graf von Rietberg was born on 30 June 1959.¹ He is the son of Christopher Richard Francis Graf von Rietberg and Kathleen Hamilton Mahan.¹ He married Rachel McLaren on 3 August 2002.¹
     He lived in 2003 at 42 Dordrecht Road, London, England^G.¹

     Ethel Elisabeth Olga Mary Gräfin von Rietberg was born on 11 September 1928 at Schloss Soss, St. Pölten, Austria^G.¹ She is the daughter of Ferdinand Alois Andreas Josef Anton Maria Prinz von und zu Liechtenstein and Shelagh Salome Houston Brunner.¹ She and Klaus Bruno von Brehm were divorced in 1961.¹ She married, secondly, Richard Douglas Loftus Onslow, son of Douglas Arthur George Onslow and Margaret Forbes Kilgour Rayner, on 16 April 1968.¹ She married, firstly, Klaus Bruno von Brehm on 16 March 1953 at Cambridge, Cambridgeshire, England^G.¹
     From 16 March 1953, her married name became von Brehm. On 11 May 1962 her name was legally changed to von Rietberg by deed poll.¹ From 16 April 1968, her married name became Onslow.