Hi
As his mother's maiden name was Romans it is unlikely that George's father's surname was Romans. It is more likely it was Neate.
George's mother Sophia would appear to have married in 1857 Samuel Sambrook. The two children listed on the census (Harriett was probably Samuel's daughter by a first marriage, so a step-sister) would be George's half-siblings - Samuel Sambrook and Emma Sambrook.
George's baptism
Baptism Collinbourne Kingston
23rd October 1832
George Romans - mother Sophia Romans
George's mother's baptism
Baptism Collingbourne Kingston Wiltshire 24th July 1808
Sophia Romans parents William and Betty
The baptism of Sophia fits the age and place of birth of Sophia Sambourne nee Romans. Her marriage certificate (1857) would confirm her father's name.
George's grandfather and aunt Ann Matthews nee Romans and George himself recorded in the surname Neate on the 1851 census with his cousin George Matthews
1851 census HO107 1844 folio 385
Aughton Collingbourne Kingston Wiltshire
Ann Mathews 43 Head Married Malters wife Collingbourne Kingston Wiltshire
George Mathews 20 Son Malter Collingbourne Kingston Wiltshire
George Neate 18 Nephew Ploughman Collingbourne Kingston Wiltshire
William Romans 80 father-in-law Widower Pauper formerly ag lab Chilsdon Wiltshire
Ann Matthews gave her age as 35 on the 1841 census (adult ages, those over 15, usually rounded down to the nearest 5 so for Ann anywhere between 35-39). She gave her age on the 1861 census as 51, so she didn't quite age at the same rate as the passing years. Her husband Thomas Matthews is with her on the 1861 census.
Ann Roman
Christening: 26 JAN 1800 Collingbourne Kingston, Wiltshire
Father: William Roman
ANN ROMAINES
THOMAS MATHEWS
Marriage: 20 OCT 1823 Saint Peter And Saint Paul, Marlborough, Wiltshire
Another sibling taken from Family Search Index (free to search)
http://www.familysearch.org/Eng/Search/frameset_search.asp?PAGE=igi/search_IGI.asp&clear_form=trueMaria Roman
Christening: 12 SEP 1802 Collingbourne Kingston, Wiltshire
Father: William Roman
Mother: Betty
MARIA ROMANS
THOMAS MARCHMENT
Marriage: 28 SEP 1822 Collingbourne Kingston, Wiltshire
possible (might be a mistake in the parish register or index re the mother's name)
Charles Romans
Christening: 11 AUG 1805 Collingbourne Kingston, Wiltshire
Father: William Romans
Mother: Mary
(looks to be married to an Ann and living in Gloucestershire on the 1851 census)
This marriage could be of another sibling
MARY ROMANS
LEVI MARCHMENT
Marriage: 15 SEP 1817 Collingbourne Kingston, Wiltshire
The baptisms of George and Emma's children in Collingbourne Kingston are indexed on Family Search
Jemima 1863
William 1865
Matha Jane 1867
George Richard 1873
Ann Maria 1874
On each of these baptisms George is recorded only as George not as George Richard. There doesn't seem any record in England - baptism, census, marriage, children's baptisms, which records him as George Richard. Perhaps the confusion on his son William's death certificate with his father's name was because his brother was so named, with the thinking that he was perhaps named after his father (which was the case with his first name but not the second).
1841 census HO107 1180/8 folio 9
Collingbourne Kingston Wiltshire
Wm Romans 65 Ag lab born in county
Elizabeth Romans 65 born in county
next door to Hannah, Charles, Robert and George Marchment aged 15, two 12s and a 7.
There is a possibility that the George aged 7 could instead be George Romans wrongly enumerated, as though Robert and Charles Marchment show on the 1851 census (born Collingbourne) there is no George Marchment.
Deaths Jun 1841
Romans Elizabeth Pewsey 8 281
Deaths Jun 1857
Romans William Pewsey 5a 107
I'll move your topic to the Wiltshire board as you have requested.
Regards
Valda