In the entire world, Kollner (Kollner 
) is an extremely rare unknown gender given name. Much more prevalently, Kollner is the last name as well as the forename.
Mr, Irene, Yoann, Annika, Cheryl, Kristy, Ronald, Daniel, Gunter, Joseph, Jerome, Thomas, Nicole, Ingrid, Matthew, Susanne, Arianna, Brandie, Phyllis, Raymond, Ricardo, Gabriel, Nancy, Gunther, Trine, Donna, Ms, Joe, Tom, Eva, Mary, Anna, Bill, Paul, Gary, Gail, Greg, John, Tina, Emma, Hank, Marie, Anika, Betty, Peter, Roger, Diane, Jayne, and Janneke