Celsa makes me think of Celsius degrees and Chelsa looks like a longer name that has been cut off.
Celsa pronounced Kelsa...no, it simply doesn't work. It's like spelling
Kevin Cevin or
Catherine Chaterine. Everyone would mispronounce it.
Does the sea exist
Because of our longing?
My PNL
http://www.behindthename.com/pnl/3258/61573