He chose the name Leo at the time of his election as pope.
Pope Leo became the Pope in 1513, his name also changed from Giovanni di Lorenzo de' Medici to Pope Leo.
If this is in reference to the 13 Leos, the first was Pope Leo I, the Great who ruled the Church from 440 to 461.
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Pope Leo III crowned Charlemagne emperor of the Romans (not the Roman people).
Some popes from the fifth century were St. Anastasius I, St. Innocent I, St. Zosimus, and St. Boniface I. Some additional popes from the fifth century were St. Celestine I, St. Sixtus III, and St. Leo I.
Pope Leo X was the pope in 1521.
Pope Leo XIII was the pope in 1896. He was pope from 1878 to 1903.
No, Pope S. Leo the Great was not married.
Leo XII reigned from 1823-to 1829
Pope Leo XIII was an excellent pope and a prolific writer of encyclicals.
You confuse Leo III (the Byzantine Emperor), who banned icons, with Pope Leo the Great (or the first), who defended them!