Family name Longnus (Longnus 
) , around the globe, is a very rare cognomen. The last name Longnus is characteristic of Sub-Saharan Africa, particularly Tanzania, where it is a rare surname, and Nigeria, where it is an extremely rare surname. More frequently, Longnus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Longnus | Tanzania, Nigeria |
| sarah longnus researcher |
|