In the entire world, Holdner (Holdner 
) is an extremely rare unknown gender first name. Much more frequently, Holdner is the last name as well as the forename.
Mr, Laura, Larry, Lowen, James, Josef, Jenna, Jerry, Julia, Julie, Donna, Terry, Edith, Emily, Henry, Heidi, Austin, Braden, Kelsey, Philip, Randal, Tyler, Robert, Diane, Kevin, Lyn, Jay, Joe, Fay, Ian, Mari, Mary, Kari, Paul, Randy, Drew, Lyle, John, Teri, Iris, Susan, Steve, April, Brent, Keith, Lisa, and Denise