Monarchs of Korea Silla (Pre-unification)
Hyeokgeose 57 BCE – 4 CE Namhae 4–24 Yuri 24–57 Talhae 57–80 Pasa 80–112 Jima 112–134 Ilseong 134–154 Adalla 154–184 Beolhyu 184–196 Naehae 196–230 Jobun 230–247 Cheomhae 247–261 Michu 262–284 Yurye 284–298 Girim 298–310 Heulhae 310–356 Naemul 356–402 Silseong 402–417 Nulji 417–458 Jabi 458–479 Soji 479–500 Jijeung 500–514 Beopheung 514–540 Jinheung 540–576 Jinji 576–579 Jinpyeong 579–632 Seondeok 632–647 Jindeok 647–654 Muyeol 654–661

Hyeokgeose of Silla (69 BC - 4 AD, r. 57 BC–4 AD), also known by his personal full name as Bak (Park, Pak) Hyeokgeose, was the founding monarch of Silla, one of the Three Kingdoms of Korea. He was the progenitor of all Bak (Park) clans in Korea.

His title Geoseogan (거서간, 居西干) or Geoseulhan (거슬한, 居瑟邯), means "king" in the language of the Jinhan confederacy, the group of chiefdoms in the southeast of the Korean Peninsula.

"Hyeokgeose" was not a personal name, but the hanja for his honorific name, pronounced "Bulgeunae" (弗矩内 불그내) in archaic Korean, meaning "bright world." 赫 hyeok, a Chinese character that means "bright, radiant, glowing" (from doubling the character for 赤 jeok "red"), is used to transcribe the Korean adjective stem 븕 bylg- > 붉 bulg- "red" (< ancient Korean word for "red; brightly colored; bright"). 居 geo, a Chinese character that means "live, dwell, reside, sit," is used to transcribe the Korean prenominal adjective inflection ㄴ -n ~ 은 -eun "~ that is (bright/red), ~ which is (bright/red)." 世 se, a Chinese character that means "generation; world; era," is used to transcribe an ancient word related to the obsolescent Korean word 뉘 nuy ~ 누리 nuri "world."

The Samguk Sagi and Samguk Yusa describe the founding of Silla by Hyeokgeose.

Refugees of Gojoseon lived in the valleys of present-day Gyeongsang-do, South Korea, in six villages called Yangsan (양산촌, 楊山村), Goheo (고허촌, 高墟村), Jinji (진지촌, 珍支村), Daesu (대수촌, 大樹村), Gari (가리촌, 加利村), and Goya (고야촌, 高耶村).

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