Other wizards?

[Legate of Amon Lanc]

Originally Posted by Hookbill the Goomba

The wording suggests that there may have been more, but I think Tolkien might have mentioned it if there were more...

To be more precise (at first I almost mistyped and wrote "precious" ) I might quote directly from the Unfinished Tales, and here it, I think, suggest that there actually were more:

Of this Order the number is unknown; but of those that came to the North of Middle-earth, where there was most hope (because of the remnant of the Dunedain and of the Eldar that abode there), the chiefs was five.

This, I think, states pretty exactly that there was more than five...
Nevertheless, as far as I know Tolkien never mentioned any others (and I think we might be glad that he even had left us something about the two Blue Wizards remaining of the Five).

I hope this does not mean that PJ will dig up an army of seventy wizards to help in the Battle of Five Armies "But Wizards do not meddle in affairs of Men and Dwarves and Elves so directly." Saruman the White: "But this time we are in need of this intervention. Brothers, arise! March to the Lonely Mountain!"