"Louis IV of Legnica (Polish: Ludwik; Brzeg, 19 April 1616 – Legnica, 24 November 1663) was a duke of Brzeg from 1633 (together with his brothers until 1654), of Wołów (during 1653-1654 with his brothers) and of Legnica from 1653 (until 1654 with his brothers, after this alone).
He was the fifth but second surviving son of John Christian, Duke of Brzeg-Legnica-Wołów-Oława, by his first wife, Dorothea Sybille, daughter of John George, Elector of Brandenburg." - (en.wikipedia.org 31.01.2020)