In all the world, Knizhnikov (Knizhnikov , Книжников ) is an extremely rare unknown gender first name. Much more frequently, Knizhnikov is the last name as well as the forename.
Книжніков, and Кніжніков
Mr, Yakov, Maksim, Aleksey, Dmitriy, Vasiliy, Svetlana, and Valentina
, Книжников 
) is an extremely rare unknown gender first name. Much more frequently, Knizhnikov is the last name as well as the forename.