Kingdom of Galicia–Volhynia
Little Russia, sometimes Little Rus' (, , ; , ; or Rus' Minor from ), is a geographical and historical term used to describe the modern-day territories of Ukraine. As a justification for its use it was attributed to be first used by Masovian-Galician ruler Bolesław-Jerzy II (House of Piast) who in 1335 signed his decrees as "Dux totius Russiæ minoris" (at the time of Kingdom of Galicia–Volhynia).