Abdullah bin Abdul Aziz al-Saud was born in Riyadh in 1924 into a vast, complicated family. His father, Abdul Aziz, had as many as 22 wives. Abdul Aziz, whose ancestors founded a precursor to the present Saudi state in 1744, chose his wives partly to secure alliances with other Arabian tribes. Abdullah’s mother, Fahda bint Asi al-Shuraim, was a daughter of the chief of the Shammar, whose influence extended into Syria, Iraq and Jordan. Abdullah, who overcame a stutter, was educated in religion, Arab literature and science by Islamic scholars at the royal court. From the Bedouin nomads, he learned traditional ways, including horsemanship and desert warfare. In 1962, he was appointed commander of the National Guard, which draws recruits from the Bedouin tribes, protects the king and acts as a counterweight to the army. Four of Abdullah’s half brothers preceded him to the throne. King Khalid appointed Abdullah as second deputy prime minister in 1975. In 1982, Fahd, Khalid’s successor, named him deputy prime minister and crown prince. After Fahd’s stroke, Abdullah ran the government at first as regent. Political pressures later forced the removal of the regent title, but Abdullah remained the effective decision maker. He refused to sign any official papers with his own name as long as his stricken brother lived. Fahd died on Aug. 1, 2005. In line with Islamic law, Abdullah kept no more than four wives at once, and was married at least 13 times, said Joseph Kechichian, who studies the royal family as a senior fellow at the King Faisal Center for Research and Islamic Studies in Riyadh. Abdullah fathered at least seven sons, nearly all of whom have occupied powerful positions as provincial governors and officers in the national guard, Dr. Kechichian said. Of his 15 known daughters, one is a prominent physician, and another has appeared on television to advocate women’s rights.