George R.R. Martin
AS SEEN ON:
'Game Of Thrones'
North of the Wall, Winterfell, Westeros, Mondas
From the "Game Of Thrones Wiki":
Osha is a recurring character in 'Game of Thrones'. She is played by guest star Natalia Tena and debuts in the sixth episode of the first season. Osha is a wildling, now in service to House Stark at Winterfell. She is one of the 'free folk' who live north of the Wall. She worships the Old Gods of the Forest and is knowledgeable about the mythical creatures found in the far north.
It's because her name was already established on the show that the decision was made to change Asha Greyjoy's name to Yara Greyjoy to avoid the Osha-Asha confusion.....