Sorry, I should have been clearer. Sonny is not uncommon here as a given name (sonny as in reference to the word son is for obvious reasons).
Anyway, I was just surprised to find out that Sonny and Sunny are basically the same name because technically I think there should be a difference in pronunciation.
* Ellen * Astrid * Eira * August * Isidore * Emmanuel *
...my brain takes a vacation just to give my heart more room...