Giannes nel Joannes

His father was Joanes nel Fusco
He had a son called Iannus dietus Paganus

Below is the start of the document of the 1079 Zani gift for the church at San Godenza , together with (above) the covering description by the Archivio Firenze. The third line of this says the document’s author is Giovanni, called Pagano, son of the late Giovanni.

If you get the photo as big as you can and look at he middle of the third line down, you can just make out the name Pagano, as per the covering description.

http://www.archiviodistato.firenze.it

Below are the two lower sections of the document