Surname Jefferi (Jefferi 
) , around the globe, is a rare family name. The cognomen Jefferi is characteristic of Malaysia, where it is a rare surname, Singapore, and Nicaragua, where it is a very rare surname. Measured by absolute frequency, it is commonest in Malaysia, Singapore, and the United States. Also, Jefferi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jefferi | India, Brazil, Singapore, Malaysia, United States |