Question: What is the date of death of Francis I Rákóczi's wife?
Answer: 18 February 1703

Countess Ilona Zrínyi (Croatian: "Jelena Zrinska", Hungarian: "Zrínyi Ilona") (1643, Ozalj – 18 February 1703, Izmit) was a noblewoman and heroine. She was one of the last surviving members of the Croatian-Hungarian Zrinski/Zrínyi noble family. She was the daughter of Petar Zrinski, Ban (viceroy) of Croatia, and the wife of Francis Rákóczi I and Imre Thököly, as well as the mother of Francis Rákóczi II