Land of the Britons
A modern spelling variant of Brittany, which refers to the region in northwest France settled by Britons. It gained popularity in the late 20th century as a geographic surname-turned-given name.
Less common today
Brithney isn't in the latest US Top 1000. It last peaked at #7,598 in 2001.
US births per 5-year period, 1990βpresent (SSA data).