In all the world, Heidner (Heidner 
) is an extremely rare masculine forename. More frequently, Heidner is the last name as well as the forename.
Mr, Dave, Dale, Dawn, Gary, Greg, Grit, Lisa, Lori, Lois, Luiz, Jane, Jose, John, Joao, Jean, Judy, Theo, Todd, Troy, Tino, Norm, Ryan, Nora, Rute, Rick, Amy, Ken, Don, Leo, Liz, Jay, Jim, Tom, Tim, Ina, Mary, Matt, Mike, Suzi, Alex, Anja, Carl, Beth, Kurt, Kris, Paul, Rita, and Eric