Theo in Korean 시오
Korean media, baristas and the immigration office write Theo as 시오: two syllables, said si-o. Here's how it's built, how to say it, and what people will call you.
Theo letter by letter
Each Hangul block is one syllable, built from a consonant, a vowel and sometimes a final consonant underneath.
ㅗ is a pure "o" with rounded lips. Don't add the w-glide English puts in "go".
- ㅇ at the top of 오 is silent, so 오 is just the vowel: o.
- Two even beats, si-o: Korean doesn't stress one syllable over the other the way English does.
How Koreans would call you
Korean given names are almost always two syllables, so 시오 already sounds natural to Korean ears. With foreign names some Koreans skip 야 and just say 시오 or 시오 씨.
Why it's spelled 시오
Spelled letter-by-letter you'd get 세오, but Korean media write 시오, because the name is written the way it sounds, not the way it's spelled.
- Korean has no th, so th becomes ㅅ (s), the closest sound.
Type Theo on a Korean keyboard
On the standard two-set (두벌식) layout, 시오 is the jamo ㅅㅣ ㅇㅗ, typed with the keys tl dh. Want to get fast at it? Try the Hangul Typing Test.
Similar names in Korean
Write any name in Hangul
Questions people ask
How do you write Theo in Korean?
Theo is written 시오 in Hangul (Revised Romanization: sio). It is the standard spelling Korean media use for the name. In Hangul it has two syllables: 시 + 오.
How do you pronounce Theo in Korean?
Say it si-o, with even weight on every syllable. ㅗ is a pure "o" with rounded lips. Don't add the w-glide English puts in "go".
Spellings follow the National Institute of Korean Language loanword rules and common Korean media usage. Last checked: October 2026.