The Dieya 疊雅 "Correct reduplications" or "The [Er]ya on reduplications" is a glossary dictionary written by the Qing period 清 (1644-1911) scholar Shi Menglan 史夢蘭 (1818-1898). According to the preface, the 13 juan "scrolls" long book was finished in 1864. Shi Menglan collected all kinds of reduplicative words (diezi 疊字) mentioned in a vast amount of traditional books, from the Confucian Classics and the various masters, and to historiographic works. The words in his dictionary are arranged according to the chapter titles used in the classical gloss book Erya 爾雅. Although some of the words Shi Menglan included in his dictionary are already mentioned in older gloss books, he also added a lot of new ones. Shi Menglan deserves credit for his detailed comments to the lexemes of his book and the diligent philological and text-critical work he had done. At the end of his book, a chapter on double-character personal names is added (Shuangminglu 雙名錄).
Source: Zhou Zumo 周祖謨 (1988). "Dieya 疊雅", in: Zhongguo da baike quanshu 中國大百科全書, Yuyan wenzi 語言•文字, p. 55. Beijing/Shanghai: Zhongguo da baike quanshu chubanshe.