asaris

Not many. Wollstonecraft is the only one I can think of off-hand pre-1900. Since then, Simone de Beauvoir (Sartre's wife), Julia Kristeva, Hannah Arendt, Elizabeth Anscombe, Simone Weil, and Iris Murdoch are really the only ones that come to mind. Even now, there aren't alot of women in grad school (though that's not necessarily from discrimination -- Philosophy is a male-dominated field, so a lot of women feel intimidated by that, even if there's no intimidation involved.)

__________________
"Die Deutschen meinen, daß die Kraft sich in Härte und Grausamkeit offenbaren müsse, sie unterwerfen sich dann gerne und mit Bewunderung:[...]. Daß es Kraft giebt in der Milde und Stille, das glauben sie nicht leicht."

"The Germans believe that power must reveal itself in hardness and cruelty and then submit themselves gladly and with admiration[...]. They do not believe readily that there is power in meekness and calm."

-- Friedrich Nietzsche