I believe you mean Giovanni de Medici. He reigned as Pope Leo X from March 9, 1513, until December 1, 1521 - 8 years, 267 days.
No. They were raised Cardinals and they both became Pope. Giovanni de Medici became Pope Leo X And Giulio de Medici became Pope Clement VII You also mentioned Giuliano de Medici. He died young killed during Easter Mass. He was stabled 19 times and died on the floor of the church. He was the father of Giulio de Medici mentioned above.
Pope Clement VII was born Giulio di Giuliano de'Medici.
After Saint Peter, the longest reigning pope was Pope Pius IX who served for 31 years, 7 months and 23 days.
According to Wili[pedia, there have been four Medici popes: Pope Leo X (December 11, 1475 - December 1, 1521), born Giovanni de' Medici, was pope from 1513 to his death. Pope Clement VII (May 26, 1478 - September 25, 1534), born Giulio di Giuliano de' Medici, was a cardinal from 1513 to 1523 and was pope from 1523 to 1534. Pope Pius IV (March 31, 1499 - December 9, 1565), born Giovanni Angelo Medici, was pope from 1559 to 1565. However, he was only distantly related to the other Medici Popes. Pope Leo XI (June 2, 1535 - April 27, 1605), born Alessandro Ottaviano de' Medici, was pope from April 1, 1605, to April 27 of the same year.
Rhe longest reigning pope was St. Peter who ruled for about 35 years. Pius IX was the second longest reigning pope. Pius IX was the longest-serving pope after Peter, holding the office for nearly 32 years.
Pope Francis is the reigning pope in 2013.
in 1513
Pope Julius II was not of Medici family but a della Rovere.
Pope Eugene IV was reigning in the year 1439.
No, Pope Saint Peter was the first pope.
Pope Sixtus IV
Pius IX served 31 years, 7 months and 23 days from 1846 to 1878 was the second longest reigning pope.