Augusta, Princess of Eulenburg and Hertefeld (née Sandels; 12 May 1853 – 14 December 1943) was a princess and spouse of Philipp, Prince of Eulenburg, who achieved considerable influence as the closest friend of Wilhelm II. The princely family of Eulenburg struggled from the so-called Eulenburg affair when Philipp was accused of homosexuality.^[1]

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Augusta Sandels was born on 12 May 1853 in Stockholm, Sweden. She was a daughter of Samuel August Sandels, and Hedvig Henrietta Emilie Augusta Tersmeden.^[2] Count Johan August Sandels was her grandfather.^[3]

On 20 November 1875, at Stockholm, Augusta Sandels married Eulenburg (Stockholm, 12 May 1853 – Liebenberg, 14 December 1941) They had eight children:

• Philipp Graf zu Eulenburg (Wulkow, 16 November 1876 – Berlin, 28 June 1878)
• Astrid Gräfin zu Eulenburg (Berlin, 25 March 1879 – Paris, 23 March 1881)
• Alexandrine (Adine) Elise Klara Antonia Gräfin zu Eulenburg (Liebenberg, 1 July 1880 – Friedelhausen, 3 February 1957), married at Liebenberg, 15 June 1910 Eberhard Graf von Schwerin (Weilburg, 11 July 1882 – Giessen, 4 April 1954)
• Friedrich Wend 2. Fürst zu Eulenburg und Hertefeld Graf von Sandels (Starnberg, 19 September 1881 – Weeze, 1 August 1963), married at Liebenberg, 21 May 1904 Marie Freiin Mayr von Melnhof (Vienna, 8 April 1884 – Weeze, 3 February 1960)
• Augusta Alexandrine Gräfin zu Eulenburg (Starnberg, 1 September 1882 – Starnberg, 28 January 1974), married in London, 4 February 1907 (div 1931) Edmund Jaroljmek
• Sigwart Botho Philipp August Graf zu Eulenburg (Munich, 10 January 1884 – k.a. Jasło, Galicia, 2 June 1915), married in Leipzig, 21 September 1909 Helene Staegemann (Hannover, 18 April 1877 – Partenkirchen, 20 August 1923)
• Karl Kuno Eberhard Wend Graf zu Eulenburg (Starnberg, 16 June 1885 – Weeze, 4 December 1975), married firstly Saint Helier, Jersey, 27 May 1908 (div 1923) Sophie Moshammer (Munich, 9 April 1891 – Munich, 8 May 1944), married secondly in Munich, 5 November 1923 Geertruida Verwey (Utrecht, 6 May 1901 – Weeze, 28 October 1987)
• Viktoria Ada Astrid Agnes Gräfin zu Eulenburg (Starnberg, 13 July 1886 – Starnberg, 23 September 1967), married at Liebenberg, 12 May 1909 (div 1921) Prof. Otto Ludwig Haas-Heye (Heidelberg, 16 December 1879 – Mannheim, 9 June 1959)

Viktoria is the great-grandmother of Sophie, Hereditary Princess of Liechtenstein.