The name Sorka is the protagonist's name in Dragonsdawn, by Anne McCaffrey. It is also the name of a main character in the Keltiad novels 'The Throne of Scone' and 'The Copper Crown', by Patricia Kennealy-Morrison, with the spelling of Sorcha.
YES! Wonderful book, and a lovely name made more-so by the character! Since names tend to take on more than their original meaning through usage (and some are begun as literary devices), it would not surprise me to have the additional meanings of "brave warrior, courageous lady", etc. added as the result of the literaty usage!