 Her grandfather was lawyer and Fellow of All Souls College, John Robert Kenyon, and her great-great-grandfather was the politician and lawyer Lloyd Kenyon, 1st Baron Kenyon.She grew up in Bloomsbury, London, in a house attached to the British Museum, with her mother, Amy Kenyon, and sister Nora Kenyon.Known for being hard-headed and stubborn, Kathleen grew up as a tomboy, fishing, climbing trees and playing a variety of sports.