Si Woo as a Baby Name. Meaning and Origin of Si Woo

What is the meaning of the name Si Woo ?

The baby name Si Woo is a Unisex name , 2 syllables long and is pronounced Korean: 시우; romanized 'Si-woo' or 'Shi-woo'; approximate English pronunciation 'shee-woo' (IPA: [ɕi.u]).

Si Woo is Korean in Origin.

Si Woo (시우) is a Korean given name formed from two Sino-Korean syllables whose meanings depend on the chosen hanja. Common options for Si include 始 “begin/start,” 時 “time,” 詩 “poetry,” and 施 “to bestow,” while Woo is often written 宇 “universe,” 佑/祐 “divine help,” 友 “friend,” or 禹 “Yu (legendary ruler).” Typical combinations yield senses like 詩宇 “poetic universe,” 始佑 “beginning with protection,” or 時宇 “time and cosmos.” Pronounced “shee-woo,” it is officially romanized as Si-u but frequently rendered Si-woo or Siwoo; some use Shi-woo/Shiwoo to signal the sh sound.

Two-syllable Sino-Korean names have long been standard, yet Si Woo surged in popularity from the 2000s, ranking among South Korea’s top boys’ names and occasionally used unisex. Its sleek sound and flexible meanings have boosted appeal, with international visibility through figures such as golfer Kim Si-woo. Variant spacings and hyphenations (Si Woo, Si-woo, Siwoo) are all common.

⚙ Si Woo doesn't appear in any of the birth registries or name datasets we track. That's typically a sign of a rare name, a regional or traditional one, or a modern coinage. Either way, it's a name very few children share.