The surname of BOOST was derived from the Old English word 'bost' a nickname given to 'one who talked vainly and bragged'. Surnames having a derivation from nicknames form the broadest and most miscellaneous class of surnames, encompassing many different types of origin. The most typical classes refer adjectivally to the general physical aspect of the person concerned, or to his character. Many nicknames refer to a man's size or height, while others make reference to a favoured article of clothing or style of dress. Many surnames derived from the names of animals and birds. In the Middle Ages ideas were held about the characters of other living creatures, based on observation, and these associations were reflected and reinforced by large bodies of folk tales featuring animals behaving as humans. The names introduced into Britain by the Normans during and in the wake of the Invasion of 1066, are nearly all territorial in origin. The followers of William the Conqueror were a pretty mixed lot, and while some of them brought the names of their castles and villages in Normandy with them, many were adventurers of different nationalities attached to William's standard by the hope of plunder, and possessing no family or territorial names of their own. Those of them who acquired lands in England were called by their manors, while others took the name of the offices they held or the military titles given to them, and sometimes, a younger son of a Norman landowner, on receiving a grant of land in his new home dropped his paternal name and adopted that of his newly acquired property.
Early records of the name mention Walter Bost, 1279 County Oxford. Walterus dictus Bost, 1300 County Oxford. Walter Boost, 1327 Couny Sussex. Richard de Boste of Yorkshire, was listed in the Yorkshire Poll Tax of the year 1379.