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In all the world, Niggemann (Niggemann ) is an extremely rare gender-neutral forename. Much more prevalently, Niggemann is the last name as well as the forename.
Naumann, Neander, Neemann, Neumann, Neumannová, Niemand, Niemann, Науман, Ниман, Нойман, נאומן, נוימן, نيومان, ニューマン, ノイマン, and 尼曼
Mr, Mats, Maik, Mona, Sven, Alex, Anna, Anja, Anke, Cory, Mara, Bodo, Paul, Pete, Ralf, Rosa, Rosi, Rolf, Rene, Ruth, Rute, Karl, Mark, Mary, Marc, Ms, Max, Mel, Sue, Ana, Ann, Ben, Kai, Kim, Pia, Leo, Len, Lia, Jan, Joe, Tim, Eva, Uli, Udo, Ute, Uwe, Dena, and Dale