Cognomen 佛洛伊德 (Floyd 
, 佛洛伊德) , in the entire world, is a common last name. The cognomen 佛洛伊德 is habitual in Antigua and Barbuda, where it is quite a common surname, the United States, and Trinidad and Tobago. Not in comparison with a country's population, it is the most numerous in the United States, the United Kingdom, and Canada. Likewise, 佛洛伊德 is the forename as well as the last name.