Frank T. Siebert

Frank Thomas Siebert Jr. (April 2, 1912 – January 23, 1998) was an American pathologist who became a leading authority on Algonquian languages, including Penobscot, for which he compiled a dictionary.

Professional career Siebert started as a medical pathologist before leaving medicine to focus on linguistics. He studied medicine at the medical school of the University of Pennsylvania graduating in 1938. Apart from his medical studies at Penn, he attended the linguistic talks and seminars given by Franz Boas at Columbia and Edward Sapir at Yale, while working to attain his M.D. degree at Penn. He was further influenced by anthropologist Frank Speck in his interest in Native American languages. Siebert explored vocabularies for flora and fauna, and also made arguments for Algonquian people's place of origin.

In 1969, he became a Guggenheim fellow.