Thx Riful for the explanation.
I've heard that MiB are usually named after famous museums all around the world, like Ruvuru/Rubel = Louvre, Orsay/Orsé = Orsay, Ermita/Eremita = Hermitage, Rado/Radu = Prado... etc. Looking at Claymore's names, they seem to be inspired in arts (Ophelia, for example). Well, I suppose we have to thank Yagi his interest in world culture, instead of choosing
cool but unpronounceable japanese names (check Bleach's databooks if you need an idea
)