JKR has updated her site with an August Wizard of the Month.

Rowena Ravenclaw
Medieval (precise dates unknown)
One of the four famous Founders of Hogwarts School of Witchcraft and Wizardry, Rowena Ravenclaw was the most brilliant witch of her time, though legend has it that a broken heart – cause unknown – contributed to her early demise.

JK Rowling .com