The Hundred Family Surnames (Chinese: 百家姓; pinyin: Bǎijiāxìng) is a classic Chinese text composed of common Chinese surnames. The book was composed in the early Song Dynasty. It originally contained 411 surnames, and was later expanded to 504. Of these, 444 are single-character surnames, and 60 are double-character surnames. About 800 names have been derived from the original ones.