Fancy might paint the "Helions" part of Helions Bumpstead, as indicating the village as being inhabited by disorderly, riotous and generally ill-behaved types, i.e. "hellions". The reality is somewhat tamer: the word comes from a participant in the Norman Conquest, Tihel de Herion, corrupted to "Helion" (he came originally from the settlement now called Hellean, in Brittany [departement of Morbihan]): Tihel having been rewarded for his Conquest-type services by King William I, with the then Manor of Bumpstead. A location of doings on the part of genuine "hellions": has been Medmenham in Buckinghamshire, between Henley-on-Thames and Marlow. The notorious 18th-century Hellfire Club of rakes, libertines and general loose-livers -- "prime mover" therein, Sir Francis Dashwood -- for a while based themselves for their dissolute revels, at the former Medmenham Abbey: calling themselves the Monks of Medmenham; these antics seemingly including "obscene parodies of religious rites".