Biographical Sketch of Amos Hagar Leave a Comment / New Hampshire / May 14, 2011 Last Updated on August 27, 2012 by AMOS HAGAR married Sarah Powers and settled on the Hagar place, opposite the C. K. Fletcher farm, and was the man from whom have descended the Hagars. Surnames:Hagar, Topics:Biography, Locations:Croydon New Hampshire, Sullivan County NH,Collection:Partridge, Dennis N. Croydon New Hampshire Genealogy.