Question: Who is the paternal grandfather of Henry Iv, Prince Of Anhalt-Bernburg?
Answer: Bernhard II, Prince of Anhalt-Bernburg

Bernhard III, Prince of Anhalt-Bernburg (died 20 August 1348) was a German prince of the House of Ascania and ruler of the principality of Anhalt-Bernburg. He was the eldest son of Bernhard II, Prince of Anhalt-Bernburg, by his wife Helene, daughter of Wizlaw II, Prince of Rügen. Henry IV, Prince of Anhalt-Bernburg (died 7 July 1374) was a German prince of the House of Ascania and ruler of the principality of Anhalt-Bernburg