Simplify the following text for a Grade 4 native English-speaking person.
Original: She was the daughter of King Henry II of France and Catherine de ' Medici and the sister of Kings Francis II , Charles IX and Henry III and of Queen Elizabeth of Spain .
Simplified: Her father was Henry II of France and her mother was Catherine of Medici . She was also the sister of Francis II of France , Charles IV of France and Henry III of France .