Family name אלטהוף (Althoff 
, אלטהוף 
) , in the entire world, is quite a common last name. The family name אלטהוף is characteristic of Germany, where it is quite a rare surname, Austria, where it is a rare surname, and the United States. Measured by absolute frequency, it is the most numerous in Germany, the United States, and Brazil. Much less frequently, אלטהוף is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Althoff | Austria, Germany, Sweden, Brazil, United States |
| אלטהוף | Israel |