Jean de Sainte-Colombe
Jean (?) de Sainte-Colombe (c. 1640 – c. 1700) was a French composer and violist. He was a celebrated master of the viola da gamba and was credited (by Jean Rousseau in his Traité de la viole (1687)) with adding the seventh string, tuned to the note AA (A1 in scientific pitch notation), on the bass viol.
From Wikipedia, released under the terms of the CC-BY-SA license.