Family name Книха (Kniha 
, Книха 
) , all around the world, is a rare cognomen. The cognomen Книха is characteristic of Slovakia, where it is quite a rare surname, Czechia, and Croatia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kniha | Czechia, Belarus, Croatia, United States, Slovakia |
| Книха | Russia |