Welch is a surname with origins in Wales, which means “foreigner” or “stranger.” The Welsh people were known for their distinct culture, language, and history, and the surname Welch reflects this heritage. Today, the Welch surname is most commonly found in the United States, where it has been passed down through generations of Welsh immigrants. Notable individuals with the Welch surname include author and poet Dylan Thomas, musician Bob Welch, and football coach Lou Holtz.