Family name קלוג (Klug 
, Kellogg 
, קלוג 
) , across the world, is a common cognomen. The last name קלוג is characteristic of Austria, where it is quite a common surname, Germany, and the United States, where it is quite a rare surname. Not in comparison with a country's population, this name is the most popular in the United States, Germany, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Klug | Germany, Austria, United States, Argentina, Brazil |
| Kellogg | Germany, United States, Canada, France, Brazil |
| קלוג | Israel |
|
איתי קלוג Israeli geographer, IL (b. 1975) |
|