Benjamin Barland and Mary Ann Millard had a son called William 1817-1881, but I don't think it is your William. Their william married Margaret Burns in Richmond in 1840 lived in Windsor St., Richmond and died on 21 October 1881 at Gunyerwarildi near Warialda. I don't think they would name 2 boys William.
Anyway here's a bit about them;
Benjamin Barland after arriving in New South Wales changed his name to South. The son of George Barland and wife Isobel, born about 1765 in London. I don't know why he changed his name. Perhaps to hide his convict past. Benjamin was a convict sentenced at the Old Bailey for assaulting and robbing Joseph Winckworth 18 April 1887. He received 7 years transportation and arrived with the 3rd Fleet on the Admiral Barrington. He first married Sarah Whiley at St. John's Parramatta and went to live at Richmond Hill. Sarah Whiley was a convict who arrived on the 'William Pitt' in 1805 from Newgate Prison after being sentenced to life in 1804 I don't know what happened to Sarah. In 1815 at Richmond he married Mary Ann Millard, she had been transported on the 'Speedy' when she was 16. on arrival she had been assigned to Benjamin. Mary died at Richmond on 16 July 1835. I know very little about this family but I do know quite a bit about Windsor and Richmond in New South Wales and recognise Benjamin South as being one of the settlers to address Lachlan Macquarie.
Benjamin South died on Monday the 6 June 1836 at Richmond.

This is your William's Obituary:
Clarence and Richmond Examiner, Saturday 13 January 1906
The death is announced of Mr. William South, of Gilgai, near Inverell, aged 83 years. The late Mr. South was born at Windsor in the year 1823, and went to New England district with Messrs. Hall Bros. who took up Stoney Ratter Station, and in whose employ he remained for seven years as stockman. While there he met and conversed with Dr. Leichhardt, at Mount Mitchell Station, where he stayed a few days, and would have had a chance of accompanying the explorer on his last and Ill-fated journey had it not been for the fact that the party was made up. Mr. South also witnessed the passing through New England of the first mob of cattle that was supposed to have crossed the McIntyre River. In later years he took a prominent part in tin mining. During the long years Mr.South lived in the land of his birth he never travelled by or saw a railway train, his principal manner of tra- velling being either on horseback or walking.
The following information from 'Holding its own. The Inverall District since 1910,' by Elizabeth Widemann:-

[Susan was a 1/2 cast Aboriginal Woman affectionately known as "Granny South" It is said that she was raised in the Perfrement Home at Cope's Creek Station during the 1860's. It was rare for a white man to marry an Aboriginal woman but William South did when he married Susan. They had nine children. Susan built up a good reputation as a midwife in the mining fields, successfully delivering hundred's of babies in the Ponds and Stannifer districts. She claimed never to have lost a mother, athough sometimes babies died. She is said to have been a "character" who smoked a corn cob pipe. She never lived with her own people, but the 8 ha block on which she lived at South's Gully, at the Ponds, was proclaimed as a reserve in 1893, though it appears to have been revoked in the same year. She continued to live in the same area, independently of other Aboriginal people, till her death in 1920 at the age of 78.]
DEATH Reg. NSW. 14968/1920 SOUTH SUSANNA 78 YRS GUYRA TINGHA
DEATH Reg. NSW 1619/1906 SOUTH WILLIAM 83 YRS INVERELL INVERELL
You certainly have your work cut out for you Tracy, it's difficult to trace family when there are so few documents.
Hope some relatives get in touch, bringing lots of info to your big family reunion.

Copes Creek Station

Thank you so so very much my dear you have help me out a hell of alot and for that I thank you. I do have a very large family and the secrets held are now coming undone once again thank you from the bottom of my heart xx

You're welcome. I'm happy to help.
Daily Observer, Tamworth, NSW. Wednesday 7 July 1920
OBITUARY
Another old identity of Tingha in the person of Mrs. Wm. South (more commonly known as "Granny" South), passed away at her home, seven miles from Tingha, on Wednesday night last.
The deceased, who was 77 years of age, had been a resident of the Tingha district for over 60 years, and was well-known and highly respected.
She had been confined to her room for the past five weeks. She leaves a family of seven grown up children. The remains were buried in Inverell on Thursday.

Thank you again :)

This might help you out;

2. Fanny South b: 25 January 1866, at Wellingrove, NSW. and died on the 18 December 1957 at Tingha where she had lived all her life. In 1912 she married John Daniel Hayden, the son of Henry James Hayden 1847-1908 and Hannah Payne 1842-1902. John Daniel was born in Mudgee on the 28 June 1866 and died at Tingha on the 13 June 1953.
These are their children:-
Elsie 1890 ? 1892
Emily Ivy 1893 - 1968 m. Francis William SINGLE
Edward John 1895 ? 1981 (ANZAC Service No. 1293 twice wounded) m. Winifred Mary BARLEY 1896-1985
Henry Herbert 1897-1973
Honora 1900 - 1966 m. William Charles O'RILEY
David Clyde 1903 ? 1993 m. Gertrude E WHACKETT
Robert Theo Victor 1906 ? 1985 m: Dorothy Blanche RAMAGE 1920-1985
Nita May 1909 ? xxxx m. Lawrence John BURDEKIN 1902-1962
All children apart from Elsie (died as an infant), were registered at birth as SOUTH and registered as HAYDEN after Fanny and John married

That sounds like them Dorothy is my mothers grand mother so thank you very much for this you are truly wonderful

I, Too Am A Direct Descendant Of William South And Susan Hill. My Grandparents Were George And Elizabeth South. Would Be Great To Chat With You..

Hello, thank you for replying. Always interested in finding out who my relatives are. And I too am up for a chat anytime :)

What is your real name?

My name is Colin, The Son Of Edward Vivian, The Son Of George And Elizageth South. My Mobile Number Is 0412521001 .l Live In The Gold Coast Of Qld.
George Is A Son Of Susan And William.
It Will Be Good To Hear From You
Regards, Colin.

Hi Colin sorry it's taken me so long to get back to you I live in the Redlands it would be lovely to catch up over coffee or something?.

Hi Emily and Francis Single are my grandparents

hello schuey. thnks for letting me know :)

My father is May South grandson his name is maxwell and lives on the sunshine coast. I have done some research on Susan South but can't find any info on her parents, can any of u help? Thanks jen

hi was granny south one of the last survivor's of the myall creek Massacre's.

Yes its looking that way gomeroiduncan

Hi Tracy

I am a descendant of the South's.

My great grandmother was Amy Edith Ainsworth South. Her father was Walter Henry South and Cecila Warwick. Her grandparents were William and Susan South.

I knew my great grandmother and she never spoke of being of Aboriginal heritage, but her son (my grandfather, George Lyle Smith) hinted at it a few times and spoke kindly of Aboriginal people.

My grandparents moved from Inverell to Sydney in 1946.

I am working with the Aboriginal community in Penrith NSW.

Thank you for all of the information you have here.

Kind regards

Narelle Smith

HILL Susan Tingha 20 acres Camped on reserve with family 1893 195 Aborigines Protection Board Register of Aboriginal reserves, 1875-1904 Item [2/8349] Reel 2847

Source: https://www.records.nsw.gov.au/searchhits_nocopy?page=3&id=47&surname=%&firstname=&location=&order=item&sort=desc Accessed 16/11/2018