Well, just last week the Swiss given name hitparades for 2008 were published, to be found here:http://www.bfs.admin.ch/bfs/portal/de/index/news/publikationen.html?publicationID=3681http://www.bfs.admin.ch/bfs/portal/de/index/news/publikationen.Document.123000.pdf
As far as I can see, these hitparades do not confirm your impression. Ladina is on a downtrend (2006: rank 32, 2007: rank 40, 2008: rank 45), and neither Corsin nor Seraina made it into the top 50 in any of the language regions. And in the hitparades for the "Svizra rumantscha", you can find many non-Romansh names.
Of course, if your info is from 2009, there might be a very recent trend developing, but maybe it's a case of selective attention, as I had when I checked the use of Albanian names in Switzerland a while ago: Suddenly I saw them *just everywhere* :)