Yes, Serena Alexandra.....i assumed these were given names... seems problematic. She was talked about though and Seren named a son Seren Alexander. I typed Serena in to the general search for Norway and some do appear so it might be possible. Or, as you suggest, it might be a name that sounds like that to the english ear. Siri is possible. I was also wondering about Sunniva. Is Sorena a name.....a feminine form of Soren? This new Soren is a possibility.