Graham Thurgood (Chinese: 杜冠明; pinyin: Dù Guānmíng) is a retired professor of linguistics at California State University, Chico. Thurgood graduated with a Ph.D. in linguistics from University of California, Berkeley, where he studied under James Matisoff. Thurgood's areas of specialization include tonogenesis, historical linguistics, language contact, and second language acquisition. Thurgood has reconstructed Chamic (Austronesian), the Hlai languages (Kra-Dai and Kam-Sui), and parts of Tibeto-Burman (Sino-Tibetan).