New Wizard of the Month at

Rounding up the Hogwarts founders, a new wizard is featured at JKR's official website:

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.