The spelling of the word Thaddej is unusual and might be confusing to some. The correct pronunciation of this word is /ˈθædˌdɛdʒ/ (thad-dej), as per the International Phonetic Alphabet (IPA) transcription. It follows the common English pattern of "th-" representing the voiceless dental fricative sound, followed by the "a" sound pronounced as "æ", and the letter "d" represented twice to emphasize the stressed syllable. The last syllable is pronounced with a voiced "j" sound, or "dʒ".