[Nufaciel]

From UT:

But two only came forward: Curumo, who was chosen by Aulë, and Alatar, who was sent by Oromë. Then Manwë asked, where was Olórin ? And Olórin, who was clad in grey, and having just entered from a journey had seated himself at the edge of the council, asked what Manwë would have of him. Manwë replied that he wished Olórin to go as the third messenger to Middle-earth (and it is remarked in parentheses that "Olórin was a lover of the Eldar that remained," apparently to explain Manwë's choice). But Olórin declared that he was too weak for such a task, and that he feared Sauron. Then Manwë said that that was all the more reason why he should go, and that he commanded Olórin (illegible words follow that seems to contain word "third"). But at that Varda looked up and said: "Not as the third;" and Curumo remembered it.
The note ends with the statement that Curumo [Saruman] took Aiwendil [Radagast] because Yavanna begged him, and that Alatar took Pallando as a friend. 6
On another page of jottings clearly belonging to the same period it is said that "Curumo was obliged to take Aiwendil to please Yavanna wife of Aulë." There are here also some rough tables relating the names of the Istari to the names of the Valar: Olórin to Manwë and Varda, Curumo to Aulë, Aiwendil to Yavanna, Alatar to Oromë, and Pallando also to Oromë (but this replaces Pallando to Mandos and Nienna).
The meaning of these relations between Istari and Valar is clearly, in the light of their brief narrative just cited, that each Istar was chosen by each Vala for his innate characteristics - perhaps even that they were members of the "people" of that Vala, in the same sense as is said of Sauron in the Valaquenta (The Silmarillion p.32) that "in the beginning he was of the Maiar of Aulë, and he remained mighty in the lore of that people." It is thus very notable that Curumo (Saruman) was chosen by Aulë. There is no hint of an explanation of why Yavanna's evident desire that the Istari should include in their number one with particular love of the things of her making could only be achieved by imposing Radagast's company on Saruman; while the suggestion in the essay on the Istari (p.407) that in becoming enamoured of the wild creatures of Middle-earth Radagast neglected the purpose for which he was sent if perhaps not perfectly in accord with the idea of his being specially chosen by Yavanna. Moreover both in the essay on the Istari and in Of the Rings of Power Saruman came first and he came alone. On the other hand it is possible to see a hint of the story of Radagast's unwelcome company in Saruman's extreme scorn for him, as related by Gandalf to the Council of Elrond: