Surname Brennon (Brennon 
) , in the entire world, is a rare last name. The last name Brennon is habitual in Malaysia, where it is a rare surname, South Africa, where it is a very rare surname, and the United States. Not in comparison with a country's population, it most frequently occurs in Malaysia, the United States, and the United Kingdom. More frequently, Brennon is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Brennon | Malaysia, United Kingdom, United States, South Africa, Canada |