Pure or gracious
Annessa is a modern American elaboration of Agnes or Anne. It combines the Greek roots of Agnes, meaning pure or chaste, with the Hebrew roots of Anne, meaning grace or favor.
Less common today
Annessa isn't in the latest US Top 1000. It last peaked at #4,304 in 1994.
US births per 5-year period, 1990βpresent (SSA data).