The spelling of the name "Katrena" can be explained using the International Phonetic Alphabet (IPA). The first syllable, "Ka," is pronounced as "kɑ," which is a short "a" sound followed by a hard "k." The second syllable, "tre," is pronounced as "treɪ," which is a long "e" sound followed by a diphthong of "ae." The final syllable, "na," is pronounced as "nə," which is a short "u" sound followed by a soft "n." Together, the IPA transcription of "Katrena" is /kɑ'treɪ.nə/.