The word "Piersson" is spelled with the /p/ sound at the beginning, followed by the long vowel sound /i:/, written as "ie". The next letter is /r/, followed by another long vowel sound /sɒ:/, written as "o". The final three letters are /n/, /s/ and /ən/, written as "-son". The IPA transcription of "Piersson" is /ˈpiəsən/ and the spelling reflects the pronunciation of the name. It is important to understand the phonetic rules of English to accurately spell words like "Piersson".