Hello Julie,
There are over 10,400 individuals with the Craig surname listed at WikiTree, over 3,200 with the Calhoun surname and over 150 with the Rardin surname.
If you want to check Miller and so on, just go to the upper right of the WikiTree page and click on the word, "Find" and look down that menu. Click on Surnames and enter the surnames that you want to explore.
You may want to look into the "Help" menu also, to get an idea of WikiTree resources.