Cognomen קאהר (Qahir 
, Kahr 
, קאהר 
) , in all the world, is quite a common surname. The cognomen קאהר is characteristic of Estonia, where it is quite a common surname, Austria, and Eswatini, where it is quite a rare surname. In absolute terms, the name is most common in Pakistan, Austria, and Germany. Much less frequently, קאהר is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Qahir | Germany, Malaysia, United States, Afghanistan, Pakistan |
| Kahr | Germany, Austria, Switzerland, United States, Denmark |
| קאהר | Israel |