Surname Jefferiss (Jefferiss 
) , in the world, is a very rare last name. The family name Jefferiss is characteristic of the United Kingdom, where it is a very rare surname, South Africa, and Canada, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in the United Kingdom, the United States, and South Africa. Much less frequently, Jefferiss is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jefferiss | United Kingdom, South Africa, Spain, United States, Canada |