Jean-Louis Duport

French cellist and composer (October 4, 1749 - September 7, 1819).
His 21 études for solo cello constitute the final part of the "Essai sur le doigté du violoncelle et sur la conduite de l'archet" ("Essay on the fingering of the violoncello and on the conduct of the bow"), from 1806, a seminal work of cello technique. He also composed 6 cello concertos.