Princess Victoria of Hesse and by Rhine

Princess Victoria of Hesse and by Rhine (5 April 1863 – 24 September 1950), later Princess Louis of Battenberg and then Victoria Mountbatten, Marchioness of Milford Haven, was the eldest daughter of Louis IV, Grand Duke of Hesse and by Rhine, and Princess Alice of the United Kingdom.

Victoria was born at Windsor Castle in the presence of her namesake grandmother, Queen Victoria. Princess Victoria was raised in Germany and England. Her mother died while Victoria's sibings were still young, which placed her in an early position of responsibility over them. Despite her father's disapproval, she married his morganatic first cousin Prince Louis of Battenberg, an officer in the British Royal Navy. Victoria lived most of her married life in various parts of Europe at her husband's naval posts and visiting her many royal relations. She was perceived by her family as liberal in outlook, straightforward, practical and bright. The couple had four children: Alice, Louise, George, and Louis.

During World War I, Victoria and her husband abandoned their German titles and adopted the surname of Mountbatten, which was an anglicised version of the German "Battenberg". Two of her sisters—Elisabeth and Alix, who had married into the Russian imperial family—were murdered by communist revolutionaries. After World War II, her daughter Louise became queen consort of Sweden and her son Louis was appointed the last viceroy of India. She was the maternal grandmother of Prince Philip, Duke of Edinburgh, consort of Queen Elizabeth II; and paternal great-grandmother of King Charles III.