the name is first encountered in the early part of the 13th century, that of imre (descendent of darabos de nádasd) and his sons, stefánd, tódor, and valkomer. another important member, deceased before 1275, was simon nádasdy. frequently mentioned in family records between 1324–1376 is pető gersei, who was married to margit hidvégi, is considered the progenitor of the family "pethő de gerse". in 1229, petan sold most of his land to a member of the family nádasdy. the buyer and his three sons, vencel/venceslav, raszló/vraslav and lászló/ladislav, now partially used the predicate of pethenegh. laszlo nádasdy of pethenegh (c. 1236) is the progenitor of main line nádasdy.