Wang (王 in pinyin: Wáng; in penkyamp & Jyutping: Wong4) is the most common Chinese family name and literally means "king" (See Chinese noble#Wang), although the name itself has no royal implications. The "-ang" sound in pinyin is supposed to be pronounced as in German and so the name is frequently mispronounced by American English speakers as IPA [wæŋ], rather than [waŋ], its correct pronunciation. The name is also frequently transliterated "Wong" especially for people from Hong Kong or from Guangdong. This other transliteration sounds much more similar to the Chinese pronunciation.
Wang is also the pinyin transliteration of 汪 (pinyin Wāng), a lesser occurring surname among the Hundred Family Names.
Wang is a Korean family name 왕 but very rare in Korea. The Goryeo Dynasty royal family name was Wang. However, after the Goryeo Dynasty fell, the royal Wangs changed their surname to avoid severe persecution from the subsequent Joseon Dynasty.
Oh or O is a rare Japanese family name which is the equivalence of Wang. Oh/O is the way Japanese pronounce the character 王. Most of the Japanese with such a surname are Chinese descendants.
Prominent people with surname 왕
Prominent people with family name 王
Prominent people with family name 汪