Biographical Sketch of Isaac Richardson Leave a Comment / New York, Pennsylvania(III) Margaret, daughter of Dr. William Plunkett, married Isaac Richardson, who removed from Sunbury, Pennsylvania, to Wayne county, New York, and became a very prominent citizen. Among their children was Isabella, mentioned elsewhere. Surnames:Richardson, Topics:Biography, Locations:Northumberland County PA, Ontario County NY, Sunbury Pennsylvania, Wayne County NY,Collection:Milliken, Charles F. The History of Ontario County, New York, and Its People Lewis Historical Publishing Co., New York. 1911. Facebook Pinterest StumbleUpon Delicious Tumblr Twitter Evernote Gmail Print Friendly Like