Matthias Johann Eisen

Matthias Johann Eisen (28 September 1857 – 6 August 1934) was an Estonian folklorist, and from 1920 to 1927 served as a professor of folk poetry at University of Tartu.

Eisen is best known for his thorough collection and a systematic typology of Estonian folk tales, totaling over 90,000 pages.

He was an honorary alumnus of the Estonian Students' Society.