None of the names you had were in the Bryant Edwards cemetery but the survey was done some time ago. There are three possibilites. 1-The graves may have been in the cemetery but the markers could have been wooden or simple funeral home signs that have since disappeared. 2- the graves are in another cemetery although I searched our files and could not find the names as listed so they could be in a cemetery that has not been surveyed; 3- the graves were marked since the survey was done.
I searched our database and did not find the names listed in any family cemeteries. They could be in church cemeteries which we have not yet indexed or they could be in town cemeteries which also are not indexed yet.
Do you know approximately when the people died? Sometimes we can locate a grave using a death certificate (available from 1915 on) or by contacting some possible funeral homes (only recent 20th century)