Did he tell you how it was spelled it or is that an assumed spelling or was that possibly a mistype? I ask because I've come across this name before but it was spelled Castile and that is also how the Kingdom of Castile and the soap of the same name is spelled and pronounced.
Castiel is - as far as I am aware - a fake angel name from the TV show Supernatural and is pronounced the way other people have mentioned.
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GavinThis message was edited 12/8/2017, 1:26 AM