Phonetic spelling writes one letter or letter group for each spoken sound, so a name says what it looks like. Unlike IPA symbols, it uses ordinary A–Z letters.
First action: say your name slowly, then write one letter or letter group per sound, like Sofia = soh-FEE-ah.
Write the respelling in four steps
Say your name aloud slowly and naturally, the way you do when introducing yourself. If it has two acceptable pronunciations, pick the one you want people to use and respell that version.
Divide it into syllables by ear, not by letters. Count the vowel peaks you hear. Marilyn splits as mar-uh-lin even though the written spelling holds more letters than sounds, so let your ear decide the breaks.
Write each syllable with ordinary letters that match its sounds. Drop silent letters entirely: Wren is just ren. Replace odd letter groups with the closest simple English ones, like sh, ch, th or ng.
Mark the stressed syllable in CAPITALS. Sofia becomes soh-FEE-ah. Stress is the syllable you say loudest and longest, and it is usually the part people get wrong first.
Check the result by reading it aloud or asking someone who has never seen the name to read it. If they say it right, you are done. If not, revise the syllable that failed, since respelling is approximate and more than one version can work.
A finished respelling is the deliverable you hand to others. Each hyphen marks a syllable break and each block of capitals marks the stressed syllable, so shi-VAWN tells a reader exactly how to say Siobhan.
My name is Siobhan. Please say it as shi-VAWN.
Here is the finished respelling for Siobhan: shi-VAWN. The tricky parts are handled. Si becomes shi because the letters sound like sh. The silent letters vanish, and the stress sits in capitals on the second syllable.
Joaquin works the same way: wah-KEEN. The Joa letters hide a w sound, so the respelling drops them and writes what you actually hear, wah. The stress moves to the last syllable, KEEN.
Some sounds in your name may not exist in your first language, so pick the closest English sound your listeners do have and accept the approximation. A th you cannot produce may become t or d, and a rolled r may become a plain English r. Write the version you can say consistently, so you give the same respelling every time someone asks.
Optional extra: hear your transcription. If you wrote IPA notation instead of A to Z respelling, a reader tool can turn it into audio. It plays the symbols you supply, it does not transcribe your name for you, and its accuracy depends on the phonemes its speech service supports, so treat the audio as a rough check.