Prince Georg, child and son of Prince Friedrich Johann and Princess Adelheid. Georg succeeded his uncle, Prince Ernst, as Duke of Saxe-Meiningen as Ernst's children were excluded from the succession per the rules of morganatic marriage.
The ‘Peacock’ Portrait - ‘Prince Alfred, Hereditary Prince of Saxe-Coburg and Gotha, Prince Ernst Ludwig of Hesse (future Grand Duke of Hesse) and Prince George of Wales (future King George V of the United Kingdom).
Princess Victoria Hesse daughter of Princess Alice daughter of Queen Victoria. She married Prince Louis of Battenberg, maternal grandmother of Prince Phillip, Duke of Edinburgh consort of Queen Elizabeth II
Royal Group on Hesse in 1899 - pictured (not in this order) are Nicholas II of Russia , Empress Alexandra , Grand Dukes Boris , Andrei and Kirill of Russia , Grand Duke Ernst and Grand Duchess Victoria Melita of Hesse and Prince Nicholas of Greece.