This is a bit long and complicated as the family is rather large.
My 3x Great Grandfather was William Foster who was born in 1816 in Witham. Fortunately for me, William was a very wealthy and well known person and so there are lots of documents and newspaper articles that tell me a lot about him.
His father was a John Foster who I know was a cordwainer and had a shop in Witham. I know this through a title deed where William Foster owned all the toll roads in the Rochford one Hundred. I also know that he had a brother also called John Foster who was a victualler in Hadleigh from the same document.
From William Fosters will I know he had another brother called Henry Foster, a sister called Elizabeth (because he left money to one of her daughters who he referred to as a niece, Elizabeth wasn't named in the will as she had already died).
So knowing that William was born in Witham to a shoemaker called John I searched for baptisms and found one, that being a baptism on 12/04/1816 at St. Nicholas Church in Witham for a William Foster where the father was John Foster, Shoemaker. The mothers name is listed as Martha.
Searching for baptism for John Foster (the brother) I find a baptism for a John True Foster also in St. Nicholas Church, Witham on 23/09/1810 and again the father is John Foster and the mother Martha. Later research suggests that his middle name was actually Trew and he did indeed become a victualler thus matching the information I already know.
Searching for baptisms for Elizabeth Foster I find a baptism again in St. Nicholas Church, Witham on 30/12/1818 and the father is John Foster, his occupation is a cordwainer but this time the mothers name is listed as Patty, not Martha.
I then opened up the search to look for any children born to a John Foster and either a Martha or Patty in the Witham area and found the following:
Eliza Ann Foster baptised 11/03/1807 in St. Nicholas Church, Witham, father John Foster, mother Martha (no indication of fathers occupation)
Sarah Eleanor Foster baptised 30/12/1808 in St. Nicholas Church, Witham, father John Foster, mother Martha (no indication of fathers occupation)
Mary Foster baptised 10/05/1814 in St. Nicholas Church, Witham, father John Foster shoemaker , mother Patty
Jane Foster baptised 21/01/1821 in St. Nicholas Church, Witham, father John Foster (actually written as Forster) Cordwainer , mother Martha
Henry Osborne Foster baptised 25/07/1827 in St. Nicholas Church, Witham, father John Foster, Cordwainer, mother Patty
Robert Foster baptised 07/04/1830 in St. Nicholas Church, Witham, father John Foster, Cordwainer, mother Patty
So a mixture of Martha and Patty but all baptised in the same church and when a fathers occupation is given, it's always a cordwainer or shoemaker.
I'm trying to prove that either Martha and Patty are the same person or that they are not and it just so happens that there were two separate John Fosters living in Witham at that time but I'm struggling to find conclusive evidence either way.
The first census that John Foster (the father) appears on is the 1841 census HO/107/337/16 Page 27 where he is living with Patty, Mary, Robert and Jane. If Jane on this census is the same Jane as in the baptism then here the census suggests the mother is Patty but the baptism says Martha.
Unfortunately Patty or Martha dies in 1847 and the death certificate gives her name as Martha saying that she is the wife of John Foster, Shoemaker.
John the father seems to disappear a bit at this stage and the only match I can find on the 1851 census is in Gillingham, Kent where he is listed as a lodger but also as a shoemaker HO 107 1611
In 1861 he is back in Terling RG 9 1108 again as a lodger and Shoemaker.
I've searched trade directories for Witham shoemakers and cordwainers to see if there were two John Fosters listed in the area but haven't been able to find anything nor have I been able to find any alternative census returns for a John Foster with a Martha instead of Patty.
I can't find anything to suggest they are not the same person but equally I cannot explain why two very different names are interchanged so freely. I did find one website that suggested that Patty was a known name variation of Martha
https://en.wikipedia.org/wiki/Martha_(given_name) and this link also appears in the Wikipedia page for the name Martha but I don't know whether to trust that or not, it just doesn't sound like the typical name variation that people would come up with.
Anyone know if Patty is a variation of Martha or know of any other ways I could try to prove one way or the other if they are the same person.