Princess Helena Victoria of Schleswig-Holstein Princess Helena Victoria of Schleswig-Holstein Princess Helena Victoria of Schleswig-Holstein (Victoria Louise Sophia Augusta Amelia Helena; 3 May 1870 – 13 March 1948) was a granddaughter of Queen Victoria of the United Kingdom. Princess Helena Victoria (always known to her family as "Thora") was born at Frogmore House, near Windsor Castle. Her father was Prince Christian of Schleswig-Holstein, the third son of Christian, Duke of Augustenburg and Countess Louise af Danneskjold-Samsøe. Her mother was Princess Helena, the fifth child and third daughter of Queen Victoria and Prince Albert of Saxe-Coburg and Gotha. Her parents resided in Britain from marriage. She
Helena Kantakouzene, Empress of Trebizond Helena Kantakouzene, Empress of Trebizond Helena Kantakouzene (died 1463) was the second wife of David of Trebizond. She was the last Empress of Trebizond. Donald Nicol has argued that Helena was the sister of George Palaiologos Kantakouzenos, and thus the granddaughter of Matthew Kantakouzenos and possibly the daughter of Demetrios I Kantakouzenos. Theodore Spandounes reports that George visited her in Trebizond after 1437. It is unclear which of David's children were also hers; his five children—three boys and two daughters—have been attributed variously to Helena or David's first wife Maria of Gothia by various genealogies. Nevertheless, the oldest sons died