I have one - she'll be six next week. I love it.
People do mishear it though - probably more because it is unusual than because it actually sounds like 'Romany/Bromley/Wobbly'
Ours doesn't have a nickname, really. Inspired by my friend's sister (in her 30s) who herself was named after/inspired by the son (because, pre-war it was pretty much a boy's name) of Welsh painter Augustus John.
Have you seen this website?
Strangely, I know of at least 5 (not counting my own)
- so not sure if that means it's due a surge (even a small one) in popularity.