An inheritor or female successor
A creative modern spelling of the English word 'heiress,' referring to a woman who inherits property or a title. It is part of a trend of using status-based nouns as names, though it remains extremely rare in the United States.
Less common today
Eiress isn't in the latest US Top 1000. It last peaked at #6,162 in 2023.
US births per 5-year period, 1990βpresent (SSA data).