Bit More,
From NSW BDM online and from NSW State Archives Online
28349/1941 Catherine Curran, registered at Waverley, possible name of father Murphy (not sure if first or surname). This was most likely Catherine Curran whose probate as per online index shows date of death as 30/10/1941 and probate granted 09/01/1941
14014/1943 James Joseph Curran, registered at Wollongong, showing father as James and mother as Ellen. This was most likely James Joseph Curran whose probate as per online index shows date of death as 06/04/1943 and probate granted 11/06/1943.
There is nothing online to indicate that either of these two people even know each other, or were connected to the Lad who fell at Fromelles.
Just Moi.