Hi,
I am also looking for ancestors of Cherstin (or some derivative spelling) Ersdotter, born in 1783, in Torsåker Parish. She was married to Per Musköt, a soldier who apparently died in the Finnish War 1808-1809. Cherstin is the mother of Anders Bergqvist, who was assigned the solider name of Bergqvist when he joined the Kongl. Helsinge Regementes Öfverste Lieutenants Compagnie. He and Catharina married on 6 November 1831. She was the daughter of a soldier as well.