Susan Butcher (1789-1862) and her son John W. Butcher (1831-1855) were buried in Swedesboro Methodist cemetery. It is now known as Bethesda United Methodist Church. Their graves are marked with headstones. No information on whether Joseph is also buried there, sorry. Some church member records are available at Gloucester Co Historical Society, on microfilm, but there are no burial records which were kept by the church.
Cemetery is located at Kings Highway and Railroad Avenue. Gravestone inscriptions are very hard to read.