Bernard the Lightsome

Bernard the Lightsome (also known as of Lwówek; Polish: Bernard Zwinny or Lwówecki; 1253 or 1257 – 25 April 1286) was a Duke of Lwówek (Löwenberg) since 1278 (with his brother until 1281) and Jawor (Jauer) during 1278–1281 (as a co-ruler of his brother).

He was the third son of Bolesław II the Bald, Duke of Legnica by his first wife Hedwig, daughter of Henry I, Count of Anhalt. It is not known when exactly he was born but had to happen before 1258, because seven years later he was sent to Wrocław by his father with the Tithe to the Bishop Thomas.