Simplify the following text for a Grade 10 native English-speaking person.
Original: Nizam , a shortened version of Nizam-ul-Mulk , meaning Administrator of the Realm , was the title of the native sovereigns of Hyderabad State , India , since 1719 , belonging to the Asaf Jah dynasty .
Simplified: Nizam , a shortened version of Nizam-ul-Mulk , meaning Administrator of the Realm , was the title of the native sovereigns of Hyderabad State , India , since 1719 . They belonged to the Asaf Jah dynasty .