King Fuad I of Egypt was born on March 26, 1868 and died on April 28, 1936. King Fuad I of Egypt would have been 68 years old at the time of death or 144 years old today.
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King Farouk I of Egypt was born on February 11, 1920 and died on March 18, 1965. King Farouk I of Egypt would have been 45 years old at the time of death or 92 years old today.
I don't think there was an age limit to become pharaoh. Tut-ankh-amon was very young when he was crowned (and when he died), as well as Cleopatra's younger brother. I'm sure there are many other...