Nicholas Camusat was a French historian born in Troyes (then part of Champagne (province)) in 1575, and died in 1655. His works are:
Chronologia ab origine orbis, usque ad ann. 1200. 4to. Promptuarium sacrarum antiquitatum Tricassinae diocesis, 1610, 8vo. Historia Albigensium, 1615. Meslanges Historiques, 1619, 8vo.
Francis Camusat, another historian, was his great-nephew.
References
This article incorporates text from Watkins Biographical Dictionary, a publication now in the public domain.