海南

Literally, south of a “sea”, which, in the case of Hainan Island or province, refers to the Qiongzhou Strait (瓊州海峽／琼州海峡 (Qióngzhōu Hǎixiá)), and in the case of Hainan Tibetan Autonomous Prefecture, refers to the Qinghai Lake (青海湖 (Qīnghǎi Hú)). The district in Wuhai, Inner Mongolia is named after its position relative to the Haibowan (海勃灣／海勃湾) District.

海南

1. (～島) Hainan Island
2. (～省) Hainan Province of the People's Republic of China, comprising Hainan Island, surrounding islands, and the Chinese claims in the South China Sea.
3. (～藏族自治州, ～州) Hainan Tibetan Autonomous Prefecture (an autonomous prefecture of Qinghai, China)
4. (～區) Hainan (a district of Wuhai, Inner Mongolia, China)
5. (～市) Kainan (a city in Wakayama Prefecture, Japan)

• (Hainan Island): (historical or literary) 瓊州／琼州 (Qióngzhōu)

• 海東／海东 (Hǎidōng)
• 海西 (Hǎixī)
• 海北 (Hǎiběi)
• 南海 (Nánhǎi)

Others:

• → English: Hainan, Hai-nan
• → Russian: Хайна́нь (Xajnánʹ)
• → Thai: ไหหลำ (hǎi-lǎm)
• → Zhuang: Haijnanz

• Duffus, William (1883), “Hainan”, in English-Chinese Vocabulary of the Vernacular or Spoken Language of Swatow, Swatow: English Presbyterian Mission Press, page 130

Mandarin 海南 (Hǎinán)

海(かい)南(なん) or 海(ハイ)南(ナン) • (Kainan or Hainan) 

1. Hainan (an island in the South China Sea)
2. Hainan (a province of China)
3. Hainan (a district of Wuhai, Inner Mongolia, China)
4. Kainan (a city in Wakayama Prefecture)

Korean 해남 (Haenam)

海(かい)南(なん) or 海(ヘ)南(ナム) • (Kainan or Henamu) 

1. Haenam (a county of South Jeolla, South Korea)

• 黄(こう)海(かい)南(なん)道(どう) (Kōkai Nandō)
• 海(かい)北(ほう) (Kaihō)

海南 • (Haenam) (hangeul 해남)

1. Hanja form^? of 해남 (“Hainan; Haenam county”).

海南

1. chữ Hán form of Hải Nam (“Hainan”).