Searching for my Great Aunt

My grandfather, Theo George Andronicos came to Sydney, Australia in 1897 on the ship "Oruba". His family lived in Potamos, Kythera. He was a young lad of fifteen when he left Greece, and turned sixteen on the voyage to Sydney. He first worked for John Comimos in Pitt Street Sydney. I don't know when his brother, Emmanuel George Andronicos came here, but know that he died in 1910 in Coonamble NSW. Emmanuel was the eldest, Theo came next and they had a younger sister, who as far as we know remained in Greece. We know that she lived in Potamos, and was alive in 1960 as one of the Samios family from Brisbane told my mother on his return from Kythera. She died soon after aged 86. We would like to know her name and where she is buried. We believe that she never married, so her family name would have been Andronicos. Her parents were George Emmanuel Andronicos and Panagiotisa Panarettos.