from www.bdm.nsw.gov.au there is a George C. REDMAN marrying a Beatrice M King in Sydney 1887 Registration Number 1885/1887. then 7 births are listed for this couplE at Sydney and Ashfield.
3605/1888 REDMAN GEORGE C 4692/1890 REDMAN FLORA M 4557/1892 REDMAN ROY 4240/1894 REDMAN URELLA M 1046/1897 REDMAN DOROTHY M 9840/1903 REDMAN ISABEL K 28192/1899 REDMAN RICHARD B is this who you are looking for?
there is this death for Roy 8123/1974 REDMAN Roy George Father George Clavering Mother Beatrice Mary.
And he is listed on the Ryerson Index if you want to get the obituary look-up www.ryersonindex.org There is also a digitilised WW1 Dossier on www.naa.gov.au for Roy REDMAN with father G.C REDMAN Leanne