Stjepan I.
Stjepan I. stands for the following people:
- Stjepan I. (Croatia) ( Stjepan I. Krešimirović ; † 1058), King of Croatia
- Stjepan I. Kotromanić (before 1270 – after 1310), Ban of Bosnia
- Stjepan I. Lacković († 1353), Ban of Croatia, see Stephan I. Lackfi
