Who dated Princess Wilhelmine of Baden?

Princess Wilhelmine of Baden (Wilhelmine Louise; 21 September 1788 – 27 January 1836), was by birth a Princess of Baden from the House of Zähringen and by marriage Grand Duchess consort of Hesse and by Rhine. Her descendants include King Charles III of the United Kingdom, King Felipe VI of Spain, and other members of European royalty.

She was the youngest daughter of Charles Louis, Hereditary Prince of Baden and Amalie of Hesse-Darmstadt, and the younger sister of Empress Elizabeth Alexeievna of Russia, born Princess Louise of Baden.

August Ludwig Freiherr von Senarclens-Grancy (French: Auguste Louis de Senarclens de Grancy; 19 August 1794 – 3 October 1871) was the firstborn son of three sons and four daughters of César Auguste, Baron von Senarclens de Grancy, (1763–1836) and his wife, Élisabeth Claudine Marie-Rose de Loriol (1773–1846). Senarclens de Grancy is reputed to have been the long-time lover of Wilhelmine of Baden, the Grand Duchess consort of Hesse, and the actual father by her of Empress Maria Alexandrovna of Russia and Prince Alexander of Hesse (who himself is an ancestor of modern royalty in Spain, the United Kingdom, and other European countries).