Which spelling do you prefer? Mirabel or Mirabelle?

I agree that Mirabelle looks a bit frilly (I prefer Isobel over Isabelle and Annabel over Annabelle), but I just don't like the look of Mirabel at all. Mirabelle is obviously a name, whereas Mirabel I've never seen before, and to me it looks more like an adjective - mirable, like adorable, etc