Where did the saying Tom Dick and Harry come from?

The phrase "Tom, Dick, and Harry" is believed to have originated in England during the 17th century as a way to refer to common men or ordinary people without specifying individuals. It was often used to denote a generic group or to emphasize that anyone could fit the description. The names chosen were likely popular at the time, representing the everyman and highlighting the idea of inclusivity. Over time, it has come to symbolize any trio of unspecified individuals.