Owen Williams:

Option 1 (IPA - International Phonetic Alphabet): /ˈoʊən ˈwɪljəmz/

Option 2 (Simplified Phonetic Spelling): OH-wen WIL-yums

Option 3 (American English Phonetic Spelling): OH-wen WIL-yuhmz

Option 4 (British English Phonetic Spelling): OH-wen WIL-imz

These options provide varying levels of detail. Option 1 uses the IPA, which is the most precise but requires familiarity with phonetic symbols. Options 2, 3, and 4 offer approximations using common English spelling conventions, with options 3 and 4 reflecting slight pronunciation differences between American and British English. The choice of which option is "best" depends on the intended audience and the level of phonetic precision needed.