海南

Wikipedia has articles on:

• 海南 (Written Standard Chinese^?)
• 海南 (Cantonese)
• 海南 (Classical)
• 海南 (Gan)
• Hói-nàm (Hakka)
• Hāi-nàng (Eastern Min)
• Hái-lâm (Southern Min)
• 海南 (Wu)

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.

“Kainan” is an orthographic borrowing from Japanese 海(かい)南(なん) (Kainan).

海南

1. (～島) Hainan, Hainan Island (an island off the coast of southern China)

   • 海南黎人，親死，不食粥飯，唯飲酒食生牛肉，以為至孝在是。
     海南黎人，亲死，不食粥饭，唯饮酒食生牛肉，以为至孝在是。

     From: Zhou Qufei, Representative Answers from the Region beyond the Mountains, 12^th century CE

     Hǎinán Lí rén, qīn sǐ, bù shí zhōu fàn, wéi yǐnjiǔ shí shēng niúròu, yǐwéi zhìxiào zài shì.

     (please add an English translation of this usage example)

2. (～省) Hainan (a province off the coast of southern China, primarily made up of Hainan Island)
3. (～藏族自治州, ～州) Hainan, Hainan Tibetan Autonomous Prefecture (a Tibetan autonomous prefecture of Qinghai, China)
4. (～區) Hainan (a district of Wuhai, Inner Mongolia autonomous region, China)
5. (～市) Kainan (a city in Wakayama Prefecture, Japan)

• (Hainan Island): (historical or literary) 瓊州／琼州 (Qióngzhōu), 瓊崖／琼崖 (Qióngyá)

• 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

 海南 on Japanese Wikipedia

Located at the southern part of 海草(かいそう)郡(ぐん) (kaisōgun, “Kaisō District, Wakayama”).

海(かい)南(なん) • (Kainan) 

1. Kainan (a city in Wakayama Prefecture, Japan)

From Mandarin 海南 (Hǎinán)

海(ハイ)南(ナン) • (Hainan) 

1. Hainan (an island and province of China)
2. Hainan, Hainan Tibetan Autonomous Prefecture (a Tibetan autonomous prefecture of Qinghai, China)
3. Hainan (a district of Wuhai, Inner Mongolia autonomous region, China)

From 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 Province, 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 :
   1. Hainan (an island and province of China)
   2. Hainan, Hainan Tibetan Autonomous Prefecture (a Tibetan autonomous prefecture of Qinghai, China)
   3. Hainan (a district of Wuhai, Inner Mongolia autonomous region, China)
   4. Haenam (a county of South Jeolla Province, South Korea)

海南

1. chữ Hán form of Hải Nam:
   1. Hainan (an island and province of China)
   2. Hainan, Hainan Tibetan Autonomous Prefecture (a Tibetan autonomous prefecture of Qinghai, China)
   3. Hainan (a district of Wuhai, Inner Mongolia autonomous region, China)