According to Knight & Butler’s Family Crest book, 1883, heraldry was employed in feudal ages to display the exploits of chivalry. General ignorance of the written language meant that these symbols were particularly significant. They addressed the imagination by a more direct channel and in a more striking manner than words. They recalled really important events in the history of people and nations. They were exhibited on the shields and vestments of warriors and they also adorned clothing and other more durable material in peacetime.
Some say their original purpose was to make a commander known to his men in battle, and also to render him more warlike, especially if the symbols were frightening eg of monsters. They also had a special use in tilts and jousting where no shield was worn making it harder to identify individual combatants.
Crests are not hereditable (unlike arms) and so every successor might assume new ones. Many people of the same name had different crests, whilst many of different names used the same crest. Women, it is asserted, may not bear crests because in ancient times they could not wear a helmet.
Fairbairn’s book of Crests of the families of Great Britain & Ireland, (London 1905), may list any existing Stundon crests.