Guðríður Þorbjarnardóttir indeed was the woman in question.

Patrick J. Stevens of the Fiske Icelandic Collection says about her: "Guðríður Þorbjarnardóttir, who lived between the cultural worlds of receding Norse paganism and advancing Christianity, is emblematic of medieval Iceland's restless, brilliant spirit. Her story, which is documented in both the Saga of Eric the Red and the Greenlanders' Saga, is a remarkable tale and reflects the dynamic role Icelandic women have played throughout that country's history."

I am sorry that it took me longer to confirm your answer, Julia, than you coming up with it. Now I look forward to your next question! And Neima, you should not worry about the pronounciation... Old Norse is not really so very complicated when it comes to pronounciation rules.. *S*