Other sites frequently link the family with William Baldridge and Jannette Holmes but Im told this is incorrect.
I'm not sure I can help with your Baldridges, but I can confirm you are probably not looking for the William Baldridge-Janette Holmes clan. They are believed to have come from Ireland about 1737 with adult children (John already married to Rebecca Clark, etc.). They first settled in Lancaster County. Some of John's descendants stayed in Pennsylvania, but John's brother Alexander, some of John's older children and later Rebecca Clark and her 2nd husband all moved to North Carolina. There is no Virginia connection.
I think you meant to write Westmoreland County, Virginia in your post, by the way. There is a connection to Westmoreland County, Pennsylvania with these Baldridges. If you are looking in Pennsylvania, that does change things.