Traitorfish
The Tighnahulish Kid
Are there really any distinctively "poor white" names, in an American context? Even things like "Billy-bob" are colloquialisms; it's not like you'd actually file an application as "Billy-Bob [Surname]", you'd write "William Robert [Surname]" or "William R. [Surname]". The closest I could think would be names associated with historically-poor ethnic groups, like "Seamus" or "Ivan", but that's not directly a matter of class.
In the UK, there are certain names which are stereotypically working class (although not specifically with black people or white people; just with non-Asians, really), but I'm not really familiar with anything like that in the US, where people generally have a less pronounced sense of class. (Even the "red-neck" stereotype is in a large part about regional prejudices, and to some extent can be thought of as an ethnic prejudice in its own right.)
In the UK, there are certain names which are stereotypically working class (although not specifically with black people or white people; just with non-Asians, really), but I'm not really familiar with anything like that in the US, where people generally have a less pronounced sense of class. (Even the "red-neck" stereotype is in a large part about regional prejudices, and to some extent can be thought of as an ethnic prejudice in its own right.)