in all fairness ...
in reply to a message by Sara Ruth
Delaware also has the Christina River and a Christina School District, so Christina is also a place name. However, Christina is used much more often as a person's name here (and just about everyplace else) than Christiana.
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Yep, sounds right. I've only even known one Christiana (and she was German), but I've known lots of Christinas. Since the Christiana I know pronounces her name with a German accent, I think I prefer that over the typical American pronunciation. Or at least I think there would be more confusion on how to pronounce Christiana here in PA since it's not a place name here. In Delaware, I guess you'd automatically get the place pronunciation.