I would know how to prn it, yes, but honestly?, that might be because it reminds me of cereal, sorry. And Cessnas (planes). However, I do see the attraction. I like different, and Cerena is different.
In response, may I ask how you might feel about Sarina? It's another variant I toy with. In fact, come to think of it I've been toying with another related name: Serenissima. If you have a thought about either...?