>
Cognomen Leydner (Leydner , Лейднер ) , worldwide, is a rare last name. The cognomen Leydner is habitual in Kazakhstan, where it is a rare surname, Kyrgyzstan, and Belarus, where it is a very rare surname. In absolute terms, the name is most common in Kazakhstan, Russia, and Belarus. Much less frequently, Leydner is the forename as well as the last name.