I realize I never actually gave my opinion on the name. I kind of like it but only when spelled Castile. The spelling Castiel is a completely different name that shouldn't be pronounced that way.
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Favorite Names:
Vivian,
Fiona,
Sabrina,
Aurora,
Hazel,
Josephine,
Delphina,
Dorothea,
Althea,
Artemis, Citrina,
Frida,
Maeve,
Luna,
Iris,
April,
Marguerite, Cascadia
Ciaran,
Rowan,
Brendan,
Malcolm,
Felix,
Robin,
Julian,
Tristan,
Magnus,
Arthur,
Adrian,
Cedar,
Cedric,
Xavier,
Connor,
Silas,
Gavin