What is "ouyang"

Ouyang ( also spelled Oyang, O. Yang, O'Yang, Owyang, Au Yong, Auyong, Ah Yong, Auyang, Au Yeung, Au Yeang, Au Yeong, Au Ieong, Ao Ieong, Eoyang, Oyong, O'Young, Auwjong, Ojong, Owyong, Au Duong, Ou Young, Ow Young) is one of the most common two-character Chinese compound surnames. However, it is not one of the top two hundred Chinese surnames, as documented by the Language Publication Society, Beijing in 1990. Ouyang constitutes one of the twenty-odd two-character surnames that have survived in modern times.