The spelling of the name "Swedberg" can be explained through International Phonetic Alphabet (IPA) phonetic transcription. The first syllable "Swe" is pronounced as /swi:/, with the "w" and "i" making a diphthong. The second syllable "d" is pronounced as /d/. The third syllable "berg" is pronounced as /bəːɡ/, with a long "e" and a voiced "g" sound. Therefore, the correct spelling should be "Swedberg", pronounced as /ˈswiːdˌbəːɡ/.