I Norge er Wang et etternavn som er avledet av steds- og gårdsnavnet Vang som betyr slette eller forsamlingsplass. (Wikipedia).
For det asiatiske etternavnet 王 (Wáng), se Wang (navn 王).
In Norway Wang is a surname derived from the place or farm name Vang which means field or assembly space.
As for most Norwegian place based surnames it means that you have to be very careful in connecting or merging suggested matches because having the same surname does not automatically indicate a relationship.
Wang is the Mandarin pronunciation of the most common surname 王 in China (as of 2007), which makes it the most common surname in the world (at 93 million, it's about the same as the current World Family Tree on Geni). It's pronounced Wong in Cantonese, and Ong in Fukinese, two of the most common transliterations for overseas Chinese, before the standard transliteration of pinyin system.
It literally means king (as the ruler in Zhou dynasty, and subsequently regional princes under the Emperor). One of the most prominent families from 2nd to 6th century was a Wang family from Taiyuan, and another Wang family from Langya (to which the calligrapher Wang Xizhi belonged).
Another entirely unrelated surname 汪, is also pronounced Wang in Mandarin (though of a different tone). It ranks as the 58th most common surname in China.