Okay, I have heard of:

No. Is too long. I have NOT heard of:

Jaygee Carr
Monica Furlong
Sally Gearhart
Dian Girard
Gayne Greeno
Leigh Kennedy
Angela Korra'ti
Malinda Lo
Phillipa Maddern
Sam Nicholson (AKA Shirley Nikolaisen)
Alex Piper
Cindy Pon

Not bad, that.

Read books by:

Lynn Abbey
Joan Aiken
Gael Baudino
Marion Zimmer Bradley
Lois McMaster Bujold
Emma Bull
Octavia Butler
Moyra Caldecott
Joy Chant
Suzy McKee Charnas
C. J. Cherryh
Pamela Dean
Carole Nelson Douglas
Diane Duane
Suzette Hayden Elgin
Kate Elliott -- as Alis Rasmussen (The Labyrinth Gate)
Sheila Finch
Mary Gentle
Barbara Hambly
Zenna Henderson
Diana Wynne Jones
Janet Kagan
Mary Robinette Kowal
Nancy Kress
Katherine Kurtz
Madeleine L'Engle
Mercedes Lackey
Tanith Lee
Ursula K. LeGuin
Jacqueline Lichtenberg
Megan Lindholm (AKA Robin Hobb)
Jean Lorrah
Elizabeth A. Lynn
Ardath Mayhar
Anne McCaffrey
Seanan McGuire (AKA Mira Grant)
Vonda McIntyre
Patricia A. McKillip
Robin McKinley
Pat Murphy
Andre Norton
Marta Randall
Mary Renault
Anne Rice
Michaela Roessner
Jessica Amanda Salmonson
Pamela F. Service
Alice Sheldon -- yes, as James Tiptree
Nancy Springer
Sherri S. Tepper
Catherine Valente
Joan Vinge
Terri Wilding
Connie Willis
Patricia C. Wrede
Jane Yolen

Technicalities:

Eleanor Arnason -- read a short story by her
Margaret Atwood -- bounced off The Assassin's Tale
Deborah Turner Harris -- co-authored works with Katherine Kurtz, and I think I bounced off one of hers.
Sharon Lee -- co-authored works with Steve Miller
Jane Lindskold -- bounced off one or two of hers
C. L. Moore -- read some of her short fiction
Janet Morris -- read some of her short fiction, if she did some of the Thieves' World stories
Susan Shwartz -- I skimmed one of hers, I think Grail of Hearts?

Own books by (counting only my own):

Joan Aiken
Eleanor Arnason
Gael Baudino
Marion Zimmer Bradley
Emma Bull
Moyra Caldecott
Joy Chant
Suzy McKee Charnas
C. J. Cherryh
Pamela Dean
Diane Duane
Suzette Hayden Elgin
Kate Elliott
Mary Gentle
Barbara Hambly
Zenna Henderson
Tanya Huff
Diana Wynne Jones
Janet Kagan
Madeleine L'Engle
Mercedes Lackey
Sharon Lee
Tanith Lee
Ursula K. LeGuin
Megan Lindholm (AKA Robin Hobb)
Jane Lindskold
Jean Lorrah
Elizabeth A. Lynn
Anne McCaffrey
Seanan McGuire (AKA Mira Grant)
Patricia A. McKillip
C. L. Moore
Pat Murphy
Andre Norton
Pamela Sargent -- if anthologies she edited count, I think I have one.
Pamela F. Service
Alice Sheldon
Nancy Springer
Lisa Tuttle
Catherine Valente
Joan Vinge
Élisabeth Vonarburg
Terri Wilding
Kate Wilhelm
Connie Willis
Patricia C. Wrede
Jane Yolen

Used to own books by (but pruned):

Lynn Abbey
Jean Auel
Candas Jane Dorsey
Sheila Finch
Gwyneth Jones
Nancy Kress
Katherine Kurtz
Ardath Mayhar
Vonda McIntyre
Anne Rice
Michaela Roessner
Marta Randall
Jessica Amanda Salmonson
Susan Shwartz
Sherri S. Tepper


How about Karen Lord? I loved Redemption in Indigo.
Nalo Hopkinson?
Esther Freisner?