Heinrich XLV was born at Ebersdorf, Reuss Younger Line, only surviving son of Heinrich XXVII, Prince Reuss Younger Line (1858–1928), (son of Heinrich XIV, Prince Reuss Younger Line, and Duchess Agnes of Württemberg) and his wife, Princess Elise of Hohenlohe-Langenburg (1864–1929), (daughter of Hermann, Prince of Hohenlohe-Langenburg and Princess Feodora of Leiningen).
Baden-Württemberg | Württemberg | Catherine, Duchess of Cambridge | Sarah, Duchess of York | Camilla, Duchess of Cornwall | Marie Louise, Duchess of Parma | Agnes | Princess Louise, Duchess of Argyll | Duchess of Cambridge | Kingdom of Württemberg | William I of Württemberg | Sarah Lennox, Duchess of Richmond and Lennox | Duchess of York | Duchy of Württemberg | Duchess of Kent | Maria Teresa, Grand Duchess of Luxembourg | Duchess of Cornwall | Duchess Charlotte Georgine of Mecklenburg-Strelitz | Catherine of Brunswick-Wolfenbüttel, Duchess of Saxe-Lauenburg | Ágnes Heller | Princess Madeleine, Duchess of Hälsingland and Gästrikland | Princess Alice, Duchess of Gloucester | Natalia Grosvenor, Duchess of Westminster | Maria Vladimirovna, Grand Duchess of Russia | Georgiana Cavendish, Duchess of Devonshire | Agnes Monica | Duchess Theatre | Duchess of Gloucester | Birgitte, Duchess of Gloucester | Agnès Varda |