Princess Feodora's parents were Emich Carl, Prince of Leiningen and Princess Victoria of Saxe-Coburg-Saalfeld. He died in 1814 and Princess Victoria re-married Prince Edward Augustus, Duke of Kent and Strathearn and had another daughter, Alexandrina Victoria who became Queen in 1837. The half sisters corresponded for the rest of Feodora's life. Feodora's Wikipedia article is here. This Feodora had a daughter also named Feodora.