She was born in Paris on 21 December 1850. Her mother's name was given as Frenchwoman Victoire Magny of Soissons, but the identity of her father was unspecified. She was baptised at the Church of St. Augustine as Marie Henriette Adélaïde. In April 1851, aged three months, she was found by a physician called Dr. Séguin, who arranged for her to be adopted by the childless English aristocrat Henry Fox, 4th Baron Holland, of Holland House in Kensington, near London, and his wife Lady Mary Augusta Coventry, a daughter of George Coventry, 8th Earl of Coventry. Lord and Lady Holland had no surviving children of their own, having suffered two stillbirths and one short-lived infant. Lady Holland was by then in her late thirties and Lord Holland insisted on adopting the girl. Her biological paternity remains a mystery; one rumour had it that she was her adoptive father's natural daughter born by his servant.
Life in London
Following the adoption, she was assigned to a nurse at Fontenay-aux-Roses and then a nanny, Madame Marque, before moving to her parents' residence, Holland House, London, in June 1853, at the age of 2 1/2. Marie grew up unaware of her background. Her adoptive father died in 1859, when she was nine. As she approached her eighteenth birthday and marriageable age, her adoptive mother's legal advisor strongly recommended disclosing the information about the adoption to her. Lady Holland complied, but her own lack of full knowledge about the matter continued to pose problems. All people who knew the truth about the identity of her biological parents had died by then. Marie eventually became estranged from her adoptive mother. Her adoptive paternal aunt, Lady Lilford, wrote in 1867: "Marie is much grown and improved. She is a very nice and affectionate girl, and has been thoroughly well educated."
Princess Sophie Maria Josepha, married in Graz on 31 July 1897 Franz Ürményi d'Ürmény, childless
Princess Julie Margarethe Maria, unmarried and childless
Princess Henriette Maria Josefa, a Benedictine nun under the name Sister Adelgundis
Princess Marie Johanna Franziska, married in Vienna on 7 June 1902 Franz Peter Johann, Count of Meran, Baron of Brandhofen, and had six children
Writer
Rumours about Marie's biological parentage continued to circulate throughout her marriage. Soon after the wedding the Marquis de Montaigu publicly denied the rumour that he was the princess's father and that her mother had died in childbirth. In 1874 Princess Marie published a book about Holland House and its art collection which sold well despite criticism from Abraham Hayward. Today her work is significant for the history of that great house. She also translated literature from German into English. George Frederic Watts painted portraits of Marie at least twice, one as a child standing with her pet Spanish pointer and another as a young woman.
List of works
Liechtenstein, Princess Marie, Holland House, 2 Vols., London, 1874. Illustrated with 38 mounted woodbury-type prints; engravings, lithographs, etc.