George Grenfell Glyn, 2nd Baron Wolverton (1824-1887) was a British Liberal politician who held office three of the the Liberal administrations of William Gladstone.
In 1876 he bought a manorial estate at Iwerne Minster in Dorset where he built a large mansion, turning much of the farmland into parkland to pursue his passion for hunting.
His connection to the St.John family came through the marriage of Captain Henry Percy St.John (1854-1921) to Maud Louisa Glyn (d1938).