Lady Constance Keeble (née Threepwood, later Schoonmaker) is a recurring fictional character in the Blandings Castle stories by British comic writer P. G. Wodehouse, being Lord Emsworth's most formidable sister, a strikingly handsome woman, with a fair, broad brow, and perfectly even white teeth. She has the carriage of an empress, and her large grey eyes are misleadingly genial.