All over the world, Hvizdak (Hvizdak 
) is an extremely rare unknown gender first name. Much more prevalently, Hvizdak is the last name as well as the forename.
Mr, Erin, Emil, Evan, Ivan, Wade, Marin, Marko, Manya, Milan, Sarah, Steve, Allen, Chris, Carol, Casey, Cindy, Brian, Karen, Keith, Pavol, Perry, Tina, Todd, Tori, Judy, Ed, Kim, Rod, Lee, Ina, Mary, Mark, Mike, Sara, Alan, Peter, Anne, Kate, Rich, Rick, Dana, Gary, Luka, Jane, Jana, Josh, John, Amie, and Robyn