Hi allister1964, i am not related in any way, but thought some starting points on descendants might help or hinder
below from
https://ssl.belfastcity.gov.uk/burialsearch/BurialSearch.aspxalso using
https://www.ancestryireland.com/ and familysearch.org
1. George Duffield
Forthbrook Shankhill Road
[B~1798] 80 Years looks like he married Sarah Coates dau of Wm CoatesRosemary St Church
d 24 March 1878 at Forthbrook
bur 27 March 1878 City Cemetery G 584 see
https://ssl.belfastcity.gov.uk/burialsearchchildren
1.1. Samuel Duffield b~1829
Samuel Duffield
[B~1829] 76 Years marries Margaret Johnston 14 june 1855 belfast dau of john johnston
d 8 January 1905 lived at 3 Craig Ailsa Terrace Whitehead probate10 January 1905
City Cemetery
G585 see
https://ssl.belfastcity.gov.uk/burialsearchchildren these 3 cant be correct
1.1.1. DUFFIELD GEORGE 1870 SAMUEL Antrim Log in Register
1.1.2. DUFFIELD GEORGE 1881 SAMUEL Down Log in Register
1.1.3. DUFFIELD GEORGE 1892 SAMUEL Antrim
1.2. George Duffield 4 Feb 1835 I think dies young see familysearch.org
1.3. George Duffield 3 Mar 1838 see familysearch.org
George Duffield if b 4 Feb1835 son of George Duffield and Sarah coates
residence Glenview Ballymagarry
[b~1838] 49 Years d 29 June 1887 bur 1 July 1887 City Cemetery
C 584
https://ssl.belfastcity.gov.uk/burialsearch speculation on HHF website ancestryireland
children
1.3.1. Mary jane b27 Dec1853,m Robert Henry son of Joseph Henry see
https://www.familysearch.org/1.3.2 Samuel b 14 Jun 1855 belfast
1.3.3. Sarah b 1863
So where does this george below fit in as he is buried with Samuel d 1905 and Mary jane henryd1892
George Duffield I am unsure who this George is yet he lives in
[b~1855] 76 Years d 11 September 1931 residence Forthbrook Ballygomartin Rd
bur 14 September 1931City CemeteryG 585
https://ssl.belfastcity.gov.uk/burialsearchhis 1901 census entry reads 5 in Ballymagarry (Woodvale Ward, Antrim) and includes a son George Duffield George b1902-3 aged 8 Male Son Prespyterian Co Down Scholar this George is not mentioned in 1911 census there is a death of a George recorded in UHF 1904
1911 Census
58 in White Rock Road (Woodvale, Antrim)
Duffield George b ~1859 52 Male Head of Family Church of Ireland Belfast Farmer Read and write English Married - 19 10 9
Duffield Margaret 39 Female Wife Church of Ireland Belfast - Read and write English Married - 19 years10 9
children
Duffield Sarah 16 Female Daughter Church of Ireland Belfast Office Clerk in Linen ? Single -
Duffield John 14 Male Son Church of Ireland Belfast Scholar Read and write English Single - Duffield Margaret 12 Female Daughter Church of Ireland Belfast Scholar Read and write Duffield Mary 11 Female Daughter Church of Ireland Belfast Scholar Read and write
Duffield David M 9 Male Son Church of Ireland Belfast Scholar Read and write
Duffield Helen E 8 Female Daughter Church of Ireland Belfast Scholar Read and
Duffield Samuel 5 Male Son Church of Ireland Belfast Scholar
Duffield Hilda 3 Female Daughter Church of Ireland Belfast –
Duffield Hugh J 1 Male Son Church of Ireland Belfast
from the irish genealogy hub these are index entries to the Tithes applotment books, with original records in PRONI Belfast
Duffield, Geo. Townland : Ballymagarry Year: 1826
Duffield, S. Townland : Edenderry Year: 1826
Duffield, S. Townland : New Enclosure Year: 1826
Carnmoney
Girvan, Chas. Townland: Ballyduff Year: 1835
Girvan, Chas. Townland: Ballyhenry Year: 1835
Girvan, John. Townland: Ballyhenry Year: 1835
Girvan, Wm. Townland: Ballyhenry Year: 1835
Girvin, Charles Townland: Ballyduff Year: 1835
Girvin, Charles Townland: Ballyhenry Year: 1835
Girvin, John Townland: Ballyhenry Year: 1835
Girvin, Wm. Townland: Ballyhenry Year: 1835
Belfast directory 1819
http://www.lennonwylie.co.uk/1819_Alphanames.htmDuffield, Samuel, publican, 164 North Street
Girvin, John, carpenter, Cromack Street
Girvin, James, carpenter, 33 West Street
1852 directory
Duffield, Samuel, Summerhill
1861 Griffiths Valuation includes and has continuation books at RONI
Duffield Anne Dock Townparks York Street Shankill Antrim
Duffield Samuel Dock Townparks Edward Street Shankill Antrim
Duffield Samuel Ballymagarry Shankill Antrim
Duffield George Ballymagarry Shankill Antrim
Duffield George Smithfield Ballymagarry Glenview Shankill Antrim
Duffield Samuel Dock Townparks Edward Street Shankill Antrim
Duffield Samuel Ballymagarry Shankill Antrim
Duffield George Smithfield Ballymagarry Glenview Shankill Antrim
Duffield George Ballymagarry Shankill Antrim
Duffield Samuel Lagmore Derryaghy Antrim
Duffield Samuel Killeaton Derryaghy Antrim
Duffield Samuel Dunmurry Drumbeg Antrim
Duffield Samuel Carnaghliss Killead Antrim
Duffield Anne Dock Townparks York Street Shankill Antrim
Duffield George Budore Tullyrusk Antrim
Duffield Samuel Derryaghy Derryaghy Antrim
good luck onwards