Corrina, My name is Terry Sperring, I must be part of the family you're inquiring about. My father John Sperring was born in Kangaroo Valley NSW (close to Nowra) to Jack and Olive Sperring, When I was very young I had an Aunty Daphne and Uncle Ernie, and yes they had 7 children, Harold, Bill, George, Kevin, Lesley, Valerie and Dawn. They lived in Woonona NSW which is where I grew up. I think my grandfather (Sperring) was your grandmothers brother. Whilst I'm not in touch with too many these days, I may be able to help you, please contact me via email and we'll see happens. Cheers ..