Manso I or II was the Prefect of Amalfi from 898

898

Year 898 was a common year starting on Sunday of the Julian calendar.- Europe :* A Magyar army headed by Álmos besieges Kiev.* Magyar tribes found the state of Szekesfehervar in Hungary....

 to 914

914

Year 914 was a common year starting on Saturday of the Julian calendar.-Africa:* February 6 – the Fatimid general, Husaba of the Kutama Berber tribe, takes Barqah ....

.

He succeeded, or may have deposed, Stephen

Stephen, Prefect of Amalfi

Stephen was the Prefect of Amalfi from 879 to 898. He was married to a daughter of the first known prefect Marinus.He succeeded his brother-in-law Pulcharius while the city was under an interdict. In 897, he entered into a war with the Duchy of Sorrento and that of Naples. He was captured by the...

, a relative of the first ruling family, and to whom he was unrelated. In 900

900

Year 900 was a leap year starting on Tuesday of the Julian calendar.- Asia :* April 21 – Namwaran and his children, Lady Angkatan and Bukah, are granted pardon by the Datu of Tondo, as represented Jayadewa, Lord Minister of Pila, which released them of all their debts as inscribed in the...

, he associated his son Mastalus

Mastalus I of Amalfi

Mastalus I was the penultimate patricius of Amalfi. He was succeeded by his son, Mastalus II, who was raised to the status of dux. His own father was the last prefect, Manso I....

 with him, following a practice that was to become widespread in the Mezzogiorno

Mezzogiorno

The Midday is a wide definition, without any administrative usage, used to indicate the southern half of the Italian state, encompassing the southern section of the continental Italian Peninsula and the two major islands of Sicily and Sardinia, in addition to a large number of minor islands...

. He retired to the monastery of Saint Benedict of Nursia in Scala, leaving Amalfi to his son, the first judge.