Clemencet, Charles, a French Benedictine, born near Autun; one of the authors of the great chronological work, “Art de Vérifier les Dates,” and wrote the history of the Port Royal (1703‒1778).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Clemenceaux, Georges Benjamin * Clemencin, Diego