The only young Neville I ever heard of was the kid in the Fig Newton commericals. lol
Alf, the TV character (I loved him! I think I had a stuffed Alf) got his name from the initials for Alien Life Form, or so I'm told.
I don't think Archibald has been used much in Britain for a VERY long time. I understand that Archive is popular there now though. I can't picture a young Archie either. ALl I picture, in fact, is Archie Bunker.
As for Rupert: well, I've heard it is somewhat popular with upwardly-mobile British parents. Idony in fact, some time ago, ina discussion of the Madeleine McCann case, made a comment about yuppie parents taking little Rupert and Francesca to nice restaurants so they could throw sundried tomato and rocket salad everywhere. lol I guess the kind of parents in UK who'd use Rupert are kind of like the American ones who'd use Annabelle and Fiona. :)