Selah is a word that appears in a lot of Jewish liturgy*, but nobody knows exactly what it means. It shows up at the ends of verses, and kind of makes the whole verse more emphatic. I name my midrashic-pondering, reverently irreverent alter-ego "Reb Selah" because I find the combination of ambiguity and assertiveness to be delightfully bold and boldly delightful. And it sounds like a feminine name; all the better!
* according to the New Comprehensive Shiloh Pocket Dictionary, c 1973, Selah is a musical term used in psalms and liturgy. Also, related words, spelled the same in Hebrew but with different vowels: Saloh or Salei, to reject, and Sulei, to be balanced. I like this name for my inner Rebbe better and better!