Charlotte MUNDAY b about 1796

[bolton]

 Hi
 I am trying to find  the parents of Charlotte Munday born about 1796 maybe Winsley or Bradford on Avon
 On the Charlotte Munday married 6 March 1828 Bathford Bath to  Isaac Gray born 1805 Murhill Winsley  sometimes on the census said born West Lavington Wilts....
 I am also trying to find out about his parents George Gray who married Priscilla ? George Gray occupation was a said to be a navigator.
They had 6 children
Rebecca   b 1798 Winterborne maybe Earl or Bassett
Isaac       b1805 Winsley
Eliza         b 1807 Winsley
Virtue       b 1809 Winsley
Harriet      b 1817 Winsley
George     b  1819 Winsley

In the 1851 census Priscilla Gray was a widow a lockgate keeper at Bradford on Avon Rebecca her daughter still living with her.
If any one can tell me more about them it would be great.
Kind regards Christine