The Lithuanian nobility or Lithuanian szlachta was historically a legally privileged hereditary elite class in the Kingdom of Lithuania and Grand Duchy of Lithuania consisting of Lithuanians from Lithuania Proper; Samogitians from Duchy of Samogitia; following Lithuania's eastward expansion into what is now Belarus, Ukraine and Russia, many ethnically Ruthenian noble families ; and, later on, predominantly Baltic German families from the Duchy of Livonia and Inflanty Voivodeship. Wikipedia