Women In Philosophy

Gargi of India (5th century BC) - important figure in the Upanishads
Themistoclea of Delphi (6th century BC) - teacher of Pythagoras
Diotima of Mantinea (5th century BC) - teacher of Socrates
          (see Plato's Symposium)
Arete of Cyrene (4th century BC) - Cyrenaic School
Aesara of Lucania (4th or 3rd century BC) - late Pythagorean
Julia Domna ("The Philosopher Julia") (3rd century AD) - dialectician
Hypatia of Alexandria (370-415 AD) (mathematics, science, philosophy) -
          Neo-Platonist
Makrina (4th century AD) - Christian Neo-Platonist
Asclepigenia of Athens (4th century AD) - Neo-Platonist

Medieval

Radegund of the Franks (6th century AD)
Saint Hilda of Whitby (7th century AD)
Hildegard of Bingen (1098-1179 AD)
Heloise of Paris (12th century AD)

Early Modern

Tarquinia Molza (1542-1617) - important writer during Italian Renaissance
Princess Elisabeth of Bohemia (1618-1680) - important critic of Descartes
Margaret Cavendish, Duchess of Newcastle (1623-1673)
Anne Viscountess Conway (1631-1678)
Damaris Cudworth, Lady Masham (1659-1708)
Mary Astell (1666-1731)
Catherine Trotter Cockburn (1679-1749)
Mary Wollstonecraft (1759-1797) - key figure in the history
          of feminist thought
Lady Mary Shepherd (1777-1847)

20th Century - Major Figures

Emma Goldman (1869-1940)
Simone Weil (1909-1943)
Hannah Arendt (1906-1975)
Ayn Rand (1905-1982)
Suzanne K. Langer (1895-1985)
Simone De Beauvoir (1908-1986)
Iris Murdoch (1919-1999)
Elizabeth Anscombe (1919-2001)

Contemporary (alphabetical order)

Patricia Churchland
Jane English
Philippa Foot
Nancy Fraser
Marilyn Frye
Trudy Govier
Marjorie Grene
Donna Haraway
Luce Irigaray
Julia Kristeva
Helen Longino
Mary Midgeley
Martha Nussbaum
Susan Sherwin
Judith Jarvis Thomson
Nancy Tuana
Karen Warren
Mary Anne Warren
Robin West
Gloria Yamoto
Iris Young
Many others