The correct spelling of the name "Arthur Wahl" is represented by its corresponding IPA phonetic transcription: [ˈɑrθər wɑl]. The first name is spelled using the letter "a" for the /ɑ/ sound, followed by the letters "r" and "th" for the /r/ and /θ/ sounds respectively. The last name consists of the letters "w" and "a" for the /w/ and /ɑ/ sounds, and a silent "h" after the "a." The "l" at the end is pronounced as a syllabic consonant /l̩/.
The term "Arthur Wahl" does not seem to have a recognized etymology. However, it is important to note that "Arthur Wahl" might be a proper name rather than a word with a specific etymology. Proper names often do not have linguistic origins or etymologies since they are unique and do not derive from common language roots. If "Arthur Wahl" is a specific name, it would be more relevant to explore its historical or personal significance rather than its etymological background.