The spelling of the word "Aydenn" can be explained using the International Phonetic Alphabet (IPA). The first sound is "ei", which is a diphthong consisting of the vowel sounds of "e" and "i". The second syllable is pronounced as "dɛn", with the "ɛ" sound being close to the "e" in "bed". The final syllable is pronounced as "ən", with the schwa sound being pronounced as the "a" in "sofa". Therefore, the correct spelling of this name is Aydenn, with emphasis on the first syllable.