At which point I realized that the character thinking this can't be going by her real name.
She's not the type to like abandoning her name and using another (unlike the one she's thinking about), and she would find it difficult to master, but she is the type to really like staying alive. Giving your enemy really good evidence that you are dead is one thing, fleeing to a land where she is unlikely to send anyone is another, but making yourself safe is yet a third. . . .
Unless your enemy has not learned your name. . . .
The enemy's certainly the type to make you respond to a new name as a way of rubbing it in. Hmmm. . . . .