Princess Feodora of Leiningen
Princess Feodora of Leiningen (Anna Feodora Auguste Charlotte Wilhelmine; 7 December 1807 – 23 September 1872) was the only daughter of Emich Karl, Prince of Leiningen and Princess Victoria of Saxe-Coburg-Saalfeld, future Duchess of Kent. Feodora and her older brother Karl, Prince of Leiningen, were maternal half-siblings of Queen Victoria of the United Kingdom.
Source: Wikipedia — Princess Feodora of Leiningen (CC BY-SA 4.0)