I am grateful to website http://www.deceasedonline.com/ for producing the following information concerning Gaubert burials and for the help from staff at the Islington cemetery general office.

	forename	burial date	authority	location	plot	comment
Gaubert	Clara	21 May 1892	London Borough of Islington	Islington Cemetery (Islington)	Public, Area 6, plot number 17436
Gaubert	Edward	22 Sep 1904	London Borough of Merton	Gap Road Cemetery (Merton)		This is Edward Fradgley Gaubert born in 1836, died 18th Sept. 1904
Gaubert	Elizabeth	22 Sep 1881	London Borough of Islington	Islington Cemetery (Islington)	Private, Area M2 1899p
Gaubert	Frank	30 Jan 1888	London Borough of Islington	Islington Cemetery (Islington)	Private, Area M2 1899p
Gaubert	Mary Ann	3 Nov 1894	London Borough of Islington	Islington Cemetery (Islington)	Public, Area 6, plot number 17451
Gaubert	Sarah	11 Oct 1858	London Borough of Islington	Islington Cemetery (Islington)	Private, Area M2 1899p
Ganbert	Mary	28 Jul 1908	London Borough of Merton	Gap Road Cemetery (Merton)		I think this is Mary Louise Gaubert nee Cogswill, widow of Edward Fradgley Gaubert (see above).
Garbert (SB)		17 Nov 1937	London Borough of Islington	Islington Cemetery (Islington)
Genbert (nb spelling)	Marian	23 Mar 1925	London Borough of Islington	Islington Cemetery (Islington)	Area M block 2 plot no. 1899	this is Marion Gaubert, Matron of the Blue Coat School. She died 18 March 1925 in 58 Ashley Rd, Islington, London aged 82 years, informant AW Gaubert nephew of 49 South View Road, Hornsey

Islington Cemetery, Finchley - shaded areas denote Gaubert plots
Mary Ann, 1 of 19 people who have been buried in Area 6, plot number 17451. 16 were interred at the outset in 1892 and Mary and another were interred in 1894. Because of the undergrowth, I 've yet to find this plot.
Clara Gaubert, 1st. wife of Sidney and mother of S.A.W. Gaubert. She was 1 of 9 all buried in this public plot in 1892. Because of the undergrowth, I 've yet to find this plot.
On the 8th Oct 1858 Edward Gaubert of Ashley Road, Canonbury, Islington purchases a 2nd Class Consecrated burial plot for 2 guineas. I think this is the Edward born in 1814.
Sarah's name is at the top of the headstone. She was the sister of Edward Gaubert who was born in 1814. Frank was the son of Alfred Gaubert (son of Edward Gaubert & Elizabeth Robinson) & Ann Peacock. Elizabeth was born in 1819 and I think she was Elizabeth Robinson, the second wife of Edward Gaubert born in 1814 Marian /Marion was born in 1843, the daughter of Edward Gaubert & Elizabeth Robinson
Sarah headstone in centre
Sarah headstone view from front
view from grave

I am grateful to findmypast.co.uk for the following burials information -

surname	forename	date of burial	age at death	d.o.b.	place of burial	address at death	dedication	data provider
Gaubert	Alfred	26 Nov 1918		not known	Sheppey, Kent		cemetery	Kent Family History Society
Gaubert	Ann	23 May 1781	7	1774	Spa Fields Burial Ground	St James Clerkenwell
Gaubert	Ann	5 Feb 1812				St Mary Workhouse,  Lambeth,		St. Mary, Lambeth burials 1777 - 1819
Gaubert	Anne	13 Mar 1816	5 days	1816	Walcot [nr Bath] Somerset		St Swithin	East Surrey Family History Society
Gaubert relationship: grandson of Edward	Arthur Alfred	August 1857	12		Isleworth, Middx.			Middlesex Burials & MIs
Gobert nb spelling 'Gob...'	Edward	29th Oct 1747			St Anne, Soho, Middx	Litchfield Street, Soho		Westminster Burials- Transcripts page 41
Gaubert	Edward	17 April 1832	47		Isleworth, Middx,			Middlesex Burials & MIs
Gaubert	Edward	26Apr 1832	47		Isleworth,  Middx			All Saints Isleworth 1813-1837 burials
Gaubert	Elizabeth	26 Jan 1823	53		St Mary, Lambeth, Surrey	Middlesex Hospital		St Mary, Lambeth burials 1777 – 1819,  East Surrey Family History Society
Gaubert	Elizabeth	13 Sep 1826	1			St Mary Workhouse, Lambeth		St Mary, Lambeth burials 1777 – 1819,  East Surrey Family History Society
Gaubert	Louisa Salome	1st. May 1893	67		Perivale	Ealing		Middlesex Burials & MIs
Gaubert	Lucy	30 Aug 1825	4 wks	1825	St Dunstan in the West	119 Chancery Lane (in Fleet St)		City of London Burials
Gaubert	Margaret	12 May 1790			St Anne, Soho, Middx			Westminster Archives
Gaubert	Mary	11 Mar 1828	62		St Anne, Soho, Middx	Litchfield Street		Westminster Archives
Gaubert	Peter	15 Jan 1740			St Anne, Soho, Middx	King Street		Westminster Archives
Gaubert	Peter	26 Nov 1816	71	1745	St Dunstan In The West	Searle's Place (In Fetter Lane)		City of London Burials
Gaubert	Richard	30 Dec 1836	16m		St James, Piccadilly, Middx			Westminster Burials- Transcripts
Gaubert but recorded as 'Ganbert'	Richard	30th Dec 1836	16m		St James, Piccadilly, Middx	Brewer Street		Westminster Burials- Transcripts
Gaubert	Robert Joseph	4. Dec 1890	62		Perivale, Middx	Mount Park, Ealing		Middlesex Burials & MIs
Gaubert, wife of Edward	Sarah Ann	10th or 15th Jan 1838	63		Isleworth			Middlesex Burials & MIs/All Saints Isleworth 1837-1852 burials
Gaubert	Stephen	6th. Sep 1804	1 yr		St Anne, Soho,  Middx			Westminster Burials- Transcripts
Gaubert	Stephen	9th. Aug 1834	65		St James, Piccadilly,  Middx	Berwick Street		Westminster Burials- Transcripts
Goubert nb 'ou' spelling	Stephen	8th Aug 1782			St Anne, Soho, Middx	Litchfield Street		Westminster Burials- Transcripts page 82
Ganbert nb 'Gan'	William	26th. Sept 1845	4wks		St John the Evangelist, Smith Square	27, Emil Street		Westminster Burials- Transcripts
Gaubert	William Frederick	12th. Feb 1844	22		St James, Piccadilly, Middx	Berwick Street		Westminster Burials- Transcripts
Gaubert	William Peter	9th. Jun 1838	42		St James, Piccadilly, Middx	Brewer Street		Westminster Burials- Transcripts

1740 - Peter Gaubert of King Street	1747 - Edward 'Gobert' of Litchfield Street
1782 - Stephen 'Goubert' of Litchfield Street	1790 - Margaret Gaubert of Litchfield Street
1804 - Stephen Gaubert of Litchfield Street	1828 - Mary Gaubert
1834 - Stephen Gaubert of Berwick Street	1836 - Richard 'Ganbert' Gaubert of Brewer Street
1838 - William Peter Gaubert of Brewer Street	1844 - William Frederick Gaubert of Berwick Street
1845 - William 'Ganbert' Gaubert