I agree that ''trashy'' or ''white trash'' are very heavy terms, that can fall easily into classism. But for the sake of helping you out, I suppose you mean names that are regarded as less distinguished by society in general.
Maybe creative spellings. I don't know if it's cultural, because I'm in a French-speaking country. But here, creative spellings are often perceived as being given by less educated parents (talking about perceptions).
I agree with others who have said that names related to luxurious and expensive objects are often seen as flashy (like
Dior,
Armani,
Precious, Prada, Bank, etc.). I would also add to that trend: names related to aristocratic titles (
King,
Reign, Baron, etc.).
Word names related to alcohol (Cognac, Budweiser) or guns (
Remington, Caliber,
Colt, Pistol, etc.). I suppose they evoke a more rural american life. I think object names in general could be negatively perceived. Think of
Apple,
Candy,
Bear, Future, etc.
It may be a cultural perception as someone not from the US, but if a name adds something like ''dee'', ''dean'', ''lee'', it will sound very southern to my non-american ears. Think of Daisy-Lee or Willowdean.
Overall, I know this is a name board and most of us are name nerds. I also know a lot of people use this site for stories and characters. Like everyone, I have personal preferences when it comes to names. But I know that ultimately, it doesn't reflect on the person's character. First of all, it is often a name given by the parents, so it reflect more on them than on the person wearing the name. Most of all, a person's name is not a reflection of who they are. I have met people with very ''distinguised and classy'' names, that turned out to be real a**wholes (let's be frank). And I have known people with strange or ''trashy'' name that ended up being great invidivudals with good values and character.
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http://www.behindthename.com/pnl/246179