I think there is a culture which values the kind of names mentioned by Lora; this doesn't apply necessarily to people who live on council estates, or are working class, or anything else, but some people do aspire to those names. That's fine - it's their choice and if they like them, that's great.
I see no reason why the names should be above criticism - like any other name, or type of name, there are people who like them and people who hate them. I hate them, but it doesn't mean I'd hate anyone bearing the name, or their parents.
the word 'chav' though rather ugly is something I suppose I associate more with materialism than any other value - materialism and defensiveness, perhaps, as well as a lack of education.
It can apply to anyone, anywhere, with however much money. Taking it a step further, some of the names appear to demonstrate a yearning for purity and beauty, thus naming the child after something rather mystical. Sadly this is sometimes in direct contrast to the child's situation and/or character, which makes it appear facile and comical.
Shall I go on, or shut the f*ck up?