The spelling of "Morriss" may seem a bit unusual compared to the more commonly seen "Morris," but it can be easily explained using IPA phonetic transcription. The double "s" at the end of the name indicates that the final consonant is in fact a voiceless sound, similar to the "ss" in "hiss." This differentiates it from the more common spelling, which would have a voiced "z" sound at the end. So, the proper pronunciation of "Morriss" would be /ˈmɔːrɪs/ with a final voiceless "s" sound.