What to do about FNU? Some people come to the United States from places in the world where only one name is used. If that name is their given name, then their immigration documentation – and maybe their drivers’ license as well will have FNU for their first name. First Name Unknown. Or if the name is their first name, then they might get GNU – nothing to do with the free software foundation – but Given Name Unknown. They live their lives as FNU or GNU. more…