FRANCIS I  ., prince of Transylvania (1645-1676), was the only son of George Rakbczy II. and Sophia Bathory . He was elected prince of Transylvania during his father's lifetime (Feb . 18, 1652), but lost both crown and father at the same time, and withdrew to the family estates, where, at Patak and Makovica, he kept a splendid court . His mother converted him to Catholicism, and on the 1st of March 1666 he married Helen Zrinyi . In 1670 he was implicated in the Zrinyi-Frangepan conspiracy, and only saved his life by the interposition of the Jesuits on the payment of an enormous ransom . See Sandor Szilagyi, The Rdkoczy Family in the 17th Century (Hung.) (Pest, 1861) .