Surnames Categorized "royalty"

This is a list of surnames in which the categories include royalty.
usage
Kron German, Swedish
From German Krone and Swedish krona meaning "crown" (from Latin corona), perhaps a nickname for one who worked in a royal household.
Rao 1 Indian, Telugu, Kannada
From Sanskrit राज (raja) meaning "king".
Stewart Scottish
Occupational name for an administrative official of an estate or steward, from Old English stig "house" and weard "guard". The Stewart family (sometimes spelled Stuart) held the Scottish crown for several centuries. One of the most famous members of the Stewart family was Mary, Queen of Scots.
Sultana Bengali, Urdu, Maltese
Bengali, Urdu and Maltese form of Sultan.
Zhou Chinese
From Chinese (zhōu) referring to the Zhou dynasty, which held power from 1046 to 771 BC, continuing for a few more centuries as figureheads.