DIXON FAMILY-VIRGINIA

I WANT TO CONNECT WITH THE DIXON FROM VIRGINIA; MY GREAT,  GRANDFATHER WAS PETER DIXON. HE WAS BORN AROUND 1820-1821 IN THE USA. HE WAS MULLATTO. HIS BIOLOGIGAL FATHER WAS WHITE. HE IS BELIEVED TO HAVE COME FROM FREDERICK, VA. ANY INFORMATION ANYONE CAN SHARE ABOUT THE DIXON FROM THE VIRGINIA AREA WOULD BE APPRECIATED.