The article is intended as a presentation and investigation of the historical terminology of traditional Lithuanian musical instruments, details of their construction, and their music-making features. The research material was collected after reviewing Lithuanian ethnomusicological literature from the end of the 19th century to the first decades of the 20th century, in order to find the earliest descriptions in the field of actual terminology. Most attention is paid to the historical works of Mikas Petrauskas (1873–1937), Pranas Puskunigis (1860–1946), Justinas Strimaitis (1895–1960), Mykolas Biržiška (1882–1922), Adolfas Sabaliauskas (1873–1950), and Teodoras Brazys (1870–1930). In this respect, traditional Lithuanian musical instruments are not studied in a systematic way, so the facts presented in this article supplement the work by the contemporary ethnomusicologists and ethno-instrumentologists Romualdas Apanavičius, Marija Baltrėnienė, Gaila Kirdienė, Vida Palubinskienė, Algirdas Vyžintas, Rūta Žarskienė, and others.