The spelling of the name "Anton Slodzin Poninski" can be broken down using the International Phonetic Alphabet (IPA). "Anton" is spelled /ˈæntɒn/, with stress on the first syllable. "Slodzin" is spelled /ˈslɒdzɪn/, with stress on the second syllable. Finally, "Poninski" is spelled /pəˈnɪnski/, with stress on the second syllable. It is important to note that the specific pronunciation may vary depending on regional accents or languages. Regardless, the IPA can help ensure that the spelling accurately represents the sounds of the name.