How South Korea Got Its Name: From Goryeo to Republic of Korea

The name **"South Korea"** reflects 20th-century geopolitics, but the linguistic roots run much deeper.

Etymological Chain

1. Goryeo (고려, 高麗) — 918–1392 CE dynasty; source of "Korea" (via Persian *Kōrī*, Arabic *Kūriya*, Italian *Corea*)
2. Joseon (조선, 朝鮮) — 1392–1897 dynasty; "Land of Morning Calm"; used internationally until 1910
3. Daehan Jeguk (대한제국, 大韓帝國) — Korean Empire (1897–1910); *Daehan* = "Great Han" (Han = ancient tribal confederacy)
4. Japanese rule (1910–1945): *Chōsen* (朝鮮) — Japanese reading of Joseon

Division & Naming (1945–1948)

• 1945: Japan surrenders; US/USSR divide peninsula at **38th parallel**
• 1948 (Aug 15): **Republic of Korea (ROK)** proclaimed in south — *Daehan Minguk* (대한민국, 大韓民國) = "Great Han People's Nation"
• 1948 (Sep 9): **Democratic People's Republic of Korea (DPRK)** proclaimed in north — *Chosŏn Minjujuŭi Inmin Konghwaguk*

"South Korea" vs. Official Names

• South Korea = English exonym for ROK (southern half of peninsula)
• ROK / Republic of Korea = Official English name
• Daehan Minguk = Official Korean name (used domestically)
• Hanguk (한국) = Colloquial short form ("Han Country")
• Namhan (남한) = "South Han" (used contrastively with *Bukhan* = North Korea)
• Pre-division: *Joseon-namdo* (조선남도) — "Southern Joseon" (rarely used)

Why "Korea" Persists in English

Goryeo → *Corea* → *Korea* (early European maps). The **K** spelling solidified during Japanese occupation (Japanese *Chōsen* → English *Korea* via telegraph codes). Both Koreas use *Korea* in English contexts (ROK, DPRK) despite different endonyms.

The name "South Korea" is thus a **Cold War geographic qualifier** applied to a polity whose Korean name (*Daehan Minguk*) claims legitimacy over the *entire* peninsula—reflecting the unresolved civil war.