What is the difference between a two-character surname (it should be easy to match the name)

Ouyang, Taishi, Duanmu, Shangguan, Sima, Dongfang, Dugu, Nangong, Wanqi, Wenren, Xiahou, Zhuge, Yuchi, Gongyang, Helian, Tantai, Huangfu, Zongzheng, Puyang , Gongye, Taishu, Shentu, Gongsun, Murong, Zhongsun, Zhongli, Changsun, Yuwen, Chengchi, Situ, Xianyu, Sikong, Luqiu, Ziche, Qiguan, Sikou, Wuma, Gongxi, Zhuansun, Rangsi, Gongliang, Qidiao, Lezheng, Zai

Fu, Guliang, Tuoba, Jiagu, Xuanyuan, Linghu, Duanqian, Baili, Huyan, Dongguo, Nanmen, Yangyu, Weisheng, Gonghu, Gongyu, Gongyi, Liangqiu, Gongzhong, Gongshang, Gongmen, Gongshan, Gongjian, Zuoqiu, Gongbo, Ximen, Gongzu, Fifth, Gongcheng, Guanqiu, Gongxi, Nanrong, Dongli, Donggong, Zhongchang, Zishu, Zisang, Jimo, Daxi and Chushi. Wu Ming