Named after George Postans who was one of many initial settlers in the region. He arrived within the Colony for a convict in 1850 and purchased 100 acres of land in 1882, a number of yrs just after finding his ticket-of-go away. The suburb was previously referred to as Caledonia. http://zanexkvbh.blogofoto.com/14277319/5-simple-techniques-for-settlement-agent-fees-perth