Female ruler of an empire
A modern creative spelling of the word Empress, denoting a woman who rules an empire or the wife of an emperor. It is part of a trend of using regal titles as given names to convey power and status.
Less common today
Empriss isn't in the latest US Top 1000. It last peaked at #11,883 in 2018.
US births per 5-year period, 1990βpresent (SSA data).