Cognomen Bertrade (Bertrade 
) , across the world, is an extremely rare surname. The family name Bertrade is characteristic of Western Europe, particularly France, where it is an extremely rare surname. Much more prevalently, Bertrade is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bertrade | Colombia, United States, Canada, France, Democratic Republic of the Congo |