For the ones I met - Charlie/Charlene, Des/Desiree, Frankie/Francesca, Dom/Domenica, Ronnie/Veronica, Stevie/Stephanie and Terry/Theresa (she spelled it with a 'y').Charlie from Hi-5. Frankie is short for Francis. Terri with a I
Dave is what an British Asian person calls a white man.
The one that gets me is Billy.
Not sure about Billy/Billie - maybe Wilhemina or Sybil or something?
When I was in the UK, one of my work colleagues was adamant that all men in Australia were named Bruce.