In The Devil's Arithmetic (a story about Jews in a concentration camp during the Holocaust), there's a character named Rivka. She teaches Chaya, the story's protagonist, how to survive in a concentration camp. At the very end of the story, it is revealed that she is Hannah's Aunt Eva.
I believe a nice variant of this name would be Rivqah, which was the name of a character in a book I've been reading. In the book Rivqah is the mother of Axis. The book is called The Wayfarer Redemption by Sara Douglass. It's a great read!