Mojs, also Moys, Majs or Majos (died September/December 1280) was a Hungarian powerful baron in the 13th century, who held various positions in the royal court since the early 1250s. He retained his influence until his death, owing to his marriage with an unidentified relative of the ruling Árpád dynasty. His last will and testament is a uniquely detailed source on the social history of the Árpádian era. Through his daughters, Mojs was maternal ancestor of the Meggyesi, Tamási, Herceg de Szekcső and Báthory de Somlyó noble families.