Black Widow Codename Origin Officially Unveiled by Marvel

Most of the speculation surrounding Natasha Romanoff
Most of the speculation surrounding Natasha Romanoff's famous codename has been inaccurate.

Black Widow Debuts Her Official New Codename as a Venomized Hero

Black Widow Codename Origin Officially Unveiled by Marvel

Black (2015) - News - IMDb

Black Widow, Official Website

Black Widow - News - IMDb

Natalia Romanoff (Earth-199999), Marvel Database

The Origins of Black Widow - IGN

The History of Black Widow

Black Widow - News - IMDb

Who Is David Harbour in the Black Widow Movie? Red Guardian