The Istari

From Tolkien Gateway
Unfinished Tales
of Númenor and Middle-earth
Part One: The First Age
Part Two: The Second Age
Part Three: The Third Age
Part Four

The Istari is the title of the second section within Part Four of Unfinished Tales of Númenor and Middle-earth.

In the section is described the background of the five wizards:

The main focus however is on Gandalf and Saruman and specifically their names in the various languages of Middle-earth.

It is important to note that the section is a composition of various manuscripts and printed texts from The Silmarillion and The Lord of the Rings with comments by Christopher Tolkien rather than a singular document. In the notes some information on Queen Berúthiel is also disclosed.