Cognomen Даллас (Dallas 
, Даллас 
) , in all the world, is a common family name. The last name Даллас is characteristic of Jamaica, where it is quite a common surname, Greece, and Belize, where it is quite a rare surname. Measured by absolute frequency, it most frequently occurs in the United States, the United Kingdom, and Greece. Also, Даллас is the forename as well as the last name.