Noblewoman and grace
A compound name combining Sarah and Anne. Sarah is a Hebrew name meaning princess or noblewoman, while Anne is a French and Latin form of the Hebrew Hannah, meaning grace or favor.
Less common today
Sarahanne isn't in the latest US Top 1000. It last peaked at #4,625 in 1995.
US births per 5-year period, 1990βpresent (SSA data).