The lady in question is 38-year Karin Vogel, who lives in Rostock, Germany. Karin's maternal great- great-grandparents were Duke Ernst of Württemberg and Natalie Eisborn. Ernst (1807-1868) was the son of Duke Alexander Friedrich of Württemberg and Princess Antoinette of Saxe-Coburg-Saafeld, whose younger siblings included Duke Ernst I of Saxe-Coburg and Gotha, the Duchess of Kent, and King Leopold I of the Belgians.
Duke Ernst's marriage in 1860 to a commoner, Natalie Eischborn, was morganatic marriage. Nathalie became Frau von Grünhof. On August 10, 1861, she gave birth to the couple's only child, Alexandra Nathalie Ernestine von Grünhof.
Ernst died on October 26, 1868 at the age of 61. His widow did not remarry, and she died on April 12, 1905.
Alexandra was married to Robert von Keudell on September 15, 1883. They were the parents of three children: Walter, Otto, and Hedwig, Hedwig, who was born in 1891, married Karl von der Trenck in 1918, adn they had five children. The youngest child, Ilse (1930) married Wolfram Vogel in 1962.
Karin Vogel, born February 4, 1973, is Ilse's third and youngest child. She has two older brothers, Martin (1963) and Klaus (1964).
Interesting piece, and kudos for my friend Dan Willis