King Saud of Saudi Arabia was born on January 15, 1902 and died on February 23, 1969. King Saud of Saudi Arabia would have been 67 years old at the time of death or 110 years old today.
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If you mean the second in the history of the kingdom it was king Saud bin Abdulaziz.but if you mean the next man whom to be king now it is prince Sultan bin Abdulaziz.