Castorena is a surname that may be spelled phonetically as /kæstəˈriːnə/. The first syllable contains the short 'a' sound, followed by a soft 's' sound in the second syllable. The third syllable is pronounced with a long 'ee' sound, while the fourth syllable features a neutral 'uh' sound. The final syllable has the same soft 'n' sound as in the second syllable. Spelling names accurately is essential for legal and personal documents, as it ensures clarity and accuracy.