The Pashtun tribes or Afghan tribes (Pashto: پښتانه ټبرونه يا پښتانه قبايل‎) are the large family units of the Eastern Iranian ethnic groups who use the Pashto language and follow Pashtunwali code of conduct. They are found primarily in Afghanistan and Pakistan and form the world's largest tribal society, comprising over 49 million people and between 350 and 400 tribes and clans. They are traditionally divided into four tribal confederacies: the Sarbani (سربڼي), the Bettani (بېټني), the Gharghashti (غرغښتي), and the Karlani (کرلاڼي).