I havn't really done a lot of research on the Lee family, but in researching my Cassels family I have run across the Lee's. I know that a Roger Gordon led the party of Irish Immigrants that arrived to South Carolina and founded the township of Williamsburg, SC,. My Cassels were members of that community. Whether they came from Ireland as many others did at that time I don't have that proof at this time. For many years I had the names of seven of Henry Cassels and his wife Margaret Mitchell children. But a few years ago someone from the Lee family in their research added two more children to that list of names. A Jacob and a Mary Cassels. It is this researcher who added these two children and believes that they are also of this family, which I should say I agree with their research.
This is the website that has the information about Cassels and Lee's and where I have drawn the names of the two additional children, that is Jacob and Mary. According to their research Mary married a John Lee.
You may have already been to their website but if not take a look.