Orby Park takes its name after the horse who won the 1907 Derby. He was owned by an Irish American politician – Boss Croker.
"At the request of Messrs. Blakiston-Houston Estate Co., it was. Resolved – That the name Manna Grove be substituted for the name Orby Crescent for a new thoroughfare on their property off Castlereagh Road. Resolved – That the name Orby Crescent be approved for a new street on the property of Messrs. Blakiston-Houston Estate Co. off Castlereagh Road". (12th February 1935).
"The City surveyor reported further on the application of the Blakiston-Houston Estate Co. to have the name of a new street on their property off Castlereagh Road changed from "Orby Crescent" to "Orby Road", and, as a majority of the owners of property on the road were in favour of the proposal, he recommended that the application be acceded to. Resolved - That the recommendation be adopted". (IC, 21st April 1936).