Contemporary Ethnic Groups - WikipediaAccording to text on this Wikipedia site, there has been constant debate over the classification of ethnic groups. Membership of an ethnic group tends to be associated with shared ancestry, history, homeland, language or dialect and cultural heritage; where the term "culture" specifically includes aspects such as religion, mythology and ritual, cuisine, dressing (clothing) style and other factors.
By the nature of the concept, ethnic groups tend to be divided into subgroups, which may themselves be or not be identified as independent ethnic groups depending on the source consulted.