Going a little further, Clara can mean bright. Of interesting note, the Benu or Bennu Bird's name in Egyptian mythology means bright or shining. The Benu Bird resurects itself after death, like the phoenix and our Clara seemingly. Also, in the Book of the dead the Benu Bird describes itself thus, “I am the Bennu bird, the Heart-Soul of Ra, the Guide of the Gods to the Tuat
.” The Heart-Soul of Ra might be a fanciful way to look at Clara's other names described earlier, Oswin Oswald.
So, could Clara's story be some kind of Phoenix, or inspired by the legends of such?