Across the world, Feirstein (Feirstein 
) is an extremely rare unknown gender given name. Much more frequently, Feirstein is the last name as well as the forename.
Max, Brian, Bruce, Paula, David, Diana, Linda, Jared, Joyce, Ellen, Ethan, Harry, Holly, Vince, Samuel, Shelby, Sheila, Stuart, Andrea, Andrew, Amanda, Audrey, Barry, Carol, Audra, Scott, Liz, Ira, Mary, Mike, Saul, Alan, Adam, Kyle, Paul, Ruth, Calman, Gail, Jeff, Judi, Eden, Erin, Fred, Sanna, Sarah, Sacha, Shane, Simon, Glen, and Briana