Complex sentence: He was the son of Khair Mohammad Khan, brother of Habibullah and Azizullah Karzai and father of current Afghan President Hamid Karzai and his brothers Ahmed Wali, Mahmud and Quayum.
Split into simpler sentences: He was the son of Khair Mohammad Khanand brother of Habibullah and Azizullah Karzai. His sons are the current Afghan President Hamid Karzai and his brothers Ahmed Wali, Mahmud and Quayum.