Cognomen Trenay (Trenay 
) , worldwide, is a very rare family name. The family name Trenay is habitual in France, where it is a very rare surname, and the United States, where it is an extremely rare surname. More frequently, Trenay is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Trenay | New Zealand, United States, South Africa, France |