Seeking Information on GG Father Ole Olsen

Looking for information on my Great Grandfather Ole Olsen & his identical twin brother Andrew Olsen, born about 1856. Mothers name possibly Johanna. They were on a ship as crew to Australia docking possibly in Adelaide. Australia about the late 1880's.They jumped ship & didn't return to Norway. My Great Grandfather married Emily Wilcox in 1890 in Liverpool New South Wales, Australia. He was involved in the Salvation Army in 1990. He had 2 children Ernest & Rose. Don't know what happened to Andrew & cant find information for Ole who was known in Australia as John. Ole died in 1918 in Australia. I have photos of them both.