There is no celebrity who uses that mononym.
1995
Summation of Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi XiXi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi Xi
Pope Pius XI was born on May 31, 1857 and died on February 10, 1939. Pope Pius XI would have been 81 years old at the time of death or 158 years old today.
Pope Leo XI was born on June 2, 1535 and died on April 27, 1605. Pope Leo XI would have been 69 years old at the time of death or 480 years old today.
Constantine XI Palaiologos was born on February 8, 1405 and died on May 29, 1453. Constantine XI Palaiologos would have been 48 years old at the time of death or 610 years old today.
Pope Innocent XI was born on May 16, 1611 and died on August 12, 1689. Pope Innocent XI would have been 78 years old at the time of death or 404 years old today.
157 years old
King Alfonso XI of Castile was born on August 13, 1311 and died on March 27, 1350. King Alfonso XI of Castile would have been 38 years old at the time of death or 703 years old today.
King Charles XI of Sweden was born on November 24, 1655 and died on April 5, 1697. King Charles XI of Sweden would have been 41 years old at the time of death or 359 years old today.
Pope Innocent XI died on August 12, 1689 at the age of 78.
Constantine XI Palaiologos died on May 29, 1453 at the age of 48.
Pope Pius XI died on February 10, 1939 at the age of 81.