John Caleb Adkins:

• John: /dʒɒn/ (using International Phonetic Alphabet - IPA) or Jahn (a simpler, more common approximation)

• Caleb: /ˈkeɪləb/ (IPA) or Kay-leb (approximation)

• Adkins: /ˈæd.kɪnz/ (IPA) or Ad-kinz (approximation)

Therefore, a phonetic spelling of the full name could be: Jahn Kay-leb Ad-kinz. Other variations are possible depending on dialect and pronunciation preferences. For example, some might pronounce Caleb as "Kay-lib" or Adkins as "Add-kins". The IPA transcriptions offer a more precise representation, but the simpler approximations are often more practical for everyday use.