The term given to ultimogeniture, i.e. inheritance by the youngest son or daughter, which was customary among unfree AS peasants; it continued in English boroughs after the Conquest. The term arose after a case in the early 14c at Nottingham which drew attention to the operation of two systems of inheritance in one town, primogeniture operating among free peasants within Norman law. The AnNor. term was tenure en Burgh Engloys.
Dictionary of Medieval Terms and Phrases. Christopher Coredon with Ann Williams.