I am looking for information in regards to my relatives last name: Knight.

I am finding that they lived in Laurens County, some are buried at Princeton Baptist Church, while others were living in Greenville.

Right now, I am looking for the parents of
William (possible name) "Irby or Erby" Duncan Knight
born abt 1856 in South Carolina. Irby married Victoria Clarissa Medlock.

If anyone can provide me with any information in regards to him or any other the Knight(s), it would be greatly appreciated. I am also related to the Medlock line that is buried in Princeton.