Seidlin is a German surname that can be spelled using the International Phonetic Alphabet as /ˈzaɪdlɪn/. The first letter, 's', is pronounced as a voiceless alveolar fricative. The second letter, 'e', is pronounced like the 'e' in 'pet'. The third letter, 'i', is pronounced as a long 'i' sound, like in the word 'pie'. The fourth letter, 'd', is pronounced as a voiced alveolar stop. The fifth letter, 'l', is pronounced as a voiced alveolar lateral approximant. The final letter, 'n', is pronounced with a nasal sound at the end of the word.