On the Goulburn Pioneer Register they are listed as NICHOLLS...
I have Johns Nicholls death as 9 Oct 1869
Ann's (1st wife) death date as 9 Oct 1853 at Bungonia and buried at St.Saviours Cemetery.
1... Agenor Robert Nicholls b. 24 Aug 1846, Lake Bathurst, NSW, died 1930 Coast Hospital, Sydney, NSW. married Adeline Milne 1871
Agenor & Adeline's Children:
Robert George Nicholls
Ernest J Nicholls
Ethel E Nicholls
Arthur Joseph Nicholls
Violet A Nicholls
Muriel E Nicholls
Ellen I Nicholls
John W Nicholls......
2.... Catherine Nicholls b. 17 Jan 1851, Tarago, NSW.
John Nicholls then married on the 8 May 1855 to Ann Tew (2nd wife) at St. Saviours, Goulburn.
Walter Nicholls b.13 Jan 1856 married Eliza D Tickner 1886
William Nicholls b.14 Jun 1858 d.1859
Thomas Nicholls b.1859 d.1942 married 1882 Amelia Batten
Joseph Jenkinson Nicholls b.10 Jun 1861 d.1886
Henry James Nicholls b.1865 d.1865
Hope that may of been of some help...