To summarise :
Thomas Tennat was married by Banns on,
9th AUg 1813
Thomas Tennat Bachelor OTP and Ann Wilson widow By Banns at St Luke Chelsea
by John Rush curate
x the mark of T Tennat
x the mark of A Wilson
wits: John ..... and John Baker (both signed)
** Ann / Agnes had a daughter from her first marriage also called Ann /Agnes
Thomas and Ann / Agnes had a son, Alexander Tennat
Baptised10 Nov 1816
s/o Thomas & Agnes
St Luke, Chelsea
Date: 10 Nov 1816
Thomas was a shoemaker
residing in Jews Row
Thomas Tennett of Jews Row was buried on 27 Feb 1818 aged 40 at St Lukes Chelsea
On 15 Jan 1819
Agnes Tennant Widow OTP (St Mary Lambeth)
married
John Hughes Bachelor OTP
by banns
by Arthur Gibson Curate
x the mark of John Hughes
x the mark of Agnes Tennant
A John Hughes and Agnes baptised a daughter. Susanna, on12 Dec 1819 at Marylebone
** this is NOT confirmed as being the daughter of your John Hughes and Agnes
Banns were read at St Mary Hanwell (Ealing) for John Watkins Bachelor and Ann Wilson Spinster BOTP
on 10 July 1831 by J Buck
17 July 1831 by Rev D Walmer
24 July 1831 by Rev J Buck
** this is Ann / Agnes the daughter of Ann / Agnes previous marriage
in 1841 just a few houses away from the Tennant family
1841 census HO107 1046/2 folio 17
Bollington Gardens Battersea Surrey
Agnes Hughes 60
Ane Hughes 4
Agnes Watkins 30
William Watkins 7
Susannah Watkins 5
all born Surrey
and 1851
1851 census HO107 1577 folio 61
1 Phoenix Wharf Battersea
Agnes Hughes 73 Head Widow Scotland
Agnes Watkins 40 Daughter Widow Warehousewoman Woodbridge Suffolk (on the 1871 and 1881 censuses states birthplace as Battersea and then Scotland)
William Watkins 16 Grandson Plasterer's Labourer Braintree Essex
Susannah Watkins 14 Granddaughter Day servant Battersea Surrey
Ann Elizabeth Hughes 13 Granddaughter Battersea Surrey
Burial
St Mary, Battersea Wandsworth 29th May 1851
Agnes Hughes aged 75, Battersea
(GRO ref Wandsworth Q2 1851 Agnes Hughes 4 39 or 58)
And possible for John (there are other Hughes being buried in Battersea at the same time)
St Mary, Battersea Wandsworth 30th May 1837
John Hughes aged 72, Battersea
Susan/Susannah Watkins on her marriage to William Baker in Battersea in 1855 gave her father's details as John Watkins, Labourer
~~~
Alexander b. 1816 m. Margaret Jane Brighton in 1836
They had several children (as found by Valda) :
St Mary, Battersea 18th October 1836 born 10th October
Elizabeth Jane Tenant parents Alexander and Margaret Jane, Battersea, father's occupation labourer
buried at the same church 11th December 1837 aged 14 months Elizabeth Tenant
same church
9th September 1840 born same day
Caroline Tennant parents Alexander and Margaret, Battersea, father's occupation labourer
14th January 1844 born 25th November 1843
Jane Tennant parents Alexander and Margaret, Battersea, father's occupation labourer
19th April 1846 born 26th March
Harriet Tennant parents Alexander and Margaret Jane, Battersea, father's occupation labourer
1st April 1849 born 5th June 1848
Alexander Tennant parents Alexander and Margaret Jane, Battersea, father's occupation labourer
buried 12th July aged 3 1851
13th October 1850 born 23rd September
Thomas Tennant parents Alexander and Margaret, Battersea, father's occupation bricklayer
27th November 1853 born 27th September
Henry Tennent parents Alexander and Margaret, Battersea, father's occupation bricklayer
1841 census HO107 1046/2 folio 17
Bolington Gardens Battersea Surrey
Ellie Tennant 25 Lab. Born Surrey
Margarett Tennant 20 born Surrey
Caroline Tennant 9 Months born Surrey
Adult ages, those over 15, are usually rounded down to the nearest 5 on the 1841 census.
1851
HO107; Piece: 1577; Folio: 138; Page: 2 Battersea - St Johns Road
Alexander Tenant 36 Head of Household born Middx, Chelsea: Bricklayer employing 1 Labourer
Margaret Tenant 34 Wife born Chelsea
Caroline Tenant 10 dau born Battersea
Jane Tenant 8 dau ditto
Harriet Tenant 5 dau ditto
Alexander Tenant 3 son ditto
Thomas Tenant 6 Mo son ditto
Alexander and Margaret arrived in Portland on 6 January 1855 on board the Birmingham. Port of departure: Plymouth.
Children with them were Caroline (14), Jane (10), Harriet (
, Thomas (3) and Henry (1).
Alexander Tennent died Collingwood Victoria Australia 1886, with wife being cited as Margaret Jane Black (But should be Brighton) Aged...72.
Margaret Jane Tennent (Brighton) died in Collingwood Victoria Australia in July 1873.
~~
It appears Ann / Agnes originated in Scotland and she was aged 73/75 in 1851 thus born circa 1777 hopefully her death certificate will show maiden name but this is not a dead cert. As the person giving the information would have had to know her maiden name.
Another way to find out would be to locate Ann / Agnes first daughter (also Ann / Agnes) bp. circa 1811 in Woodbridge Battersea or Scotland (as per the census I would go fro Battersea first) – this would then say her fathers name and then you can locate a marriage betwixt Ann / Agnes senior and the father to give her maiden name unless she was a widow on that marriage. 32 is a bit long in the tooth for a first marriage (in my opinion)