Answer
Ottokar II's grandfather was Přemysl Ottokar I, the King of Bohemia from 1198 to 1230. A significant figure in Czech history, Přemysl Ottokar I expanded the kingdom's territories, gained the Golden Bull of Sicily in 1212, establishing Bohemia's royal status, and founded several cities, including České Budějovice. His reign marked a period of growth, prosperity, and increased international recognition for the Kingdom of Bohemia.