Effendi or effendy (Turkish: efendi [eˈfændi]; Ottoman Turkish: افندی, romanized: efendi; originally from Medieval Greek: αφέντης [aˈfendis]) is a title of nobility meaning sir, lord or master, especially in the Ottoman Empire and the Caucasus. The title itself and its other forms are originally derived from Medieval Greek aphentēs which is derived from Ancient Greek authentēs meaning lord. The Republican Turkish authorities abolished the title circa the 1930s.