Hello LizzieL and softly softly,
Their children were Mary, Sarah, Jane, Edward, Henry, Samuel, James and Charles.
It is thought that Samuel Jarvis father was Joseph Jarvis who married Ann Bunting 25 Oct 1796 at St Andrews Rugby Warwickshire. I have found a majority of who are believed to be his siblings baptism records and indeed they all show as Joseph and Ann Jarvis.
Looks like I will need to plough through baptism and marriage records page by page to see what I can find.
My thanks to you both for your replies.