Looking for information on GG Father

Looking for information on my GG Father Ole Olsen and his identical twin brother Andrew Olsen, born about 1856. Mothers name possibly Johanna. They were on a Norwegian ship as crew to Adelaide, Australia about the late 1870's. They jumped ship in Adelaide. My GG Father married Emily Wilcox in 1890 in Liverpool, NSW. Was involved with The Salvation Army in 1890 in Liverpool, NSW, Australia. Had 2 children, Ernest & Rose. Cant find any of their Norwegian heritage.