The word "Leontideus" is spelled as lɪˈɒntɪdiəs in IPA phonetic transcription. This Greek word is derived from "Leon" meaning lion and "tidas" meaning child. The correct spelling of this word can be a bit tricky as it includes silent letters like 'e' and 'u'. The letter combination 'eo' is pronounced as 'ɪe' and 'eu' is pronounced as 'ju'. So, the correct pronunciation of "Leontideus" is lee-on-ti-dee-uhs.