Tarnowski (plural: Tarnowscy) is the surname of a Polish noble and aristocratic family. Because Polish adjectives have different forms for the genders, Tarnowska is the form for a female family member.
The Tarnowski family was one of the oldest and most powerful magnate families in Poland. The family reached its apex in the 14th, 15th and the 16th centuries, when members of the Tarnów, Melsztyn and later from Jarosław branches held prominent positions beside the Piast and Jagiellon kings of Poland. From father to son, the Tarnowski family held ten times the office of voivode of Kraków Voivodeship and six times the office of castellan of Kraków.
The history of the family started with the trusted advisor of the last Piast kings Comes Spytek z Melsztyna, the progenitor of the Tarnowski-Melsztyński-Jarosławski family. By 1320 he held the office of voivode of Krakow, and from 1331 the highest secular office in the Kingdom of Poland, castellan of Krakow. For his military service, King Władysław I the Elbow-high gave him large estates on the Dunajec river, where Spytek founded the city of Tarnow in 1330 and built two stronghold castles in Tarnow and Melsztyn around 1340.
After the death of Spytek, the castle of Melsztyn was inherited by his son Jan z Melsztyna, who like his father was from 1360 voivode and castellan of Kraków. His younger brother, the castellan of Wiślica Rafał z Tarnowa, became the owner of Tarnow. Rafał expanded his estates, adding land in Sandomierz, Wielowieś and Dzików.