Beatrice Mary Grenville Freeman-Grenville, 12th Lady Kinloss (18 August 1922 – 30 September 2012) was a British peer. The eldest of the three daughters of Luis Chandos Francis Temple Morgan-Grenville and Katherine Beatrice MacKenzie Jackman, she was educated at Ravenscroft School Eastbourne. She was the senior heir-general to Edward Seymour, Viscount Beauchamp, the only son of Lady Catherine Grey. The 12th Lady Kinloss died on 30 September 2012. She was succeeded by her daughter, Teresa Freeman-Grenville, 13th Lady Kinloss.