Last name ラスク (Lask 
, Rask 
, ラスク 
, along with others...) , worldwide, is a common cognomen. The surname ラスク is habitual in Northern Europe, particularly Denmark, where it is quite a common surname, Finland, and Sweden. In absolute terms, it is the most numerous in the United States, Denmark, and Finland. Very seldom, ラスク is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lusk, Lask | United Kingdom, United States, Australia, Canada, Germany |
| Rask | Sweden, Finland, United States, Denmark, Canada |
| ラスク | Japan |
| Rusk | United Kingdom, Sweden, Finland, United States, Canada |
| Luske | Israel, United Kingdom, United States, Australia, Canada |