Family name Knein (Knein 
) , globally, is a rare cognomen. The surname Knein is characteristic of Germany, where it is a rare surname, South Africa, where it is an extremely rare surname, and the United States. Very seldom, Knein is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Knein | Germany, India, United States, South Africa |