 It was named after John Churchill, 1st Duke of Marlborough, an ancestor of Winston Churchill.The land, which was to become the town, was part of several estates known as Grove Landing, Meadows, and Darnall's Chance, owned by the Brooke, Beall, and Darnall families, respectively.Darnall's Chance, also known as the Buck House, Buck-Wardrop House, or James Wardrop House, is a historic home located at 14800 Governor Oden Bowie Drive, in Upper Marlboro.