Kuo yü tz?u tien p. 1233 (Lü Tung-pin; given name Yen)
LCCN 78835781: His Yi shuo, 1976 (hdg.: Lü, Yan, 798-870)
Tz?u hai, 1979 p. 1665 (Lü Tung-pin, 798-?; given name Yen; h. Ch?un-yang-tzu)
Wikipedia, Jan. 27, 2010 (Lü Dongbin (呂洞賓); historical figure; his name is Lü Yan; Dongbin is his courtesy name; called Master Pure-Yang (純陽子 Chunyang Zi); also Lü the Progenitor (呂祖 lü zu); b. around 796, Jingzhao Prefecture; also a poet)