The spelling of the name "McCoskey" can be explained using the International Phonetic Alphabet (IPA). The first syllable is pronounced "mə" with a short "uh" sound, followed by "kɑ" with a long "a" sound. The second syllable is pronounced "ski" with a short "i" sound and a silent "h". The third syllable is pronounced "i" with a long "i" sound. Finally, the fourth syllable is pronounced "ə" with a short "uh" sound. Therefore, the correct spelling of this name is "McCoskey".