Hi Joannicea,
Somewhat late but...
Your name reminds me immediately of
Boadicea, a Celtic
Queen who fought against the Romans. It's likely that your name is
Joan or
Joann with the -icea ending. I don't know what it means though. I wouldn't think it's
Joan with a -nicea ending.
This:
http://www.google.com/search?hl=en&q=queen+boadiceawill tell you more than you want about
Boadicea and maybe (slim) there will be a snippet explaining her name.
Boadicea is a latinized version of the Celtic name
Boudicca.
I haven't got Acrobat installed yet (new system) and so haven't read this:
http://www.st-andrews.ac.uk/institutes/sassi/spns/INDEX2I.pdfbut it is an Index of Celtic Elements and may explain what -icca means.
:-)