Olaf II of Denmark

Olaf II Haakonsson (1370 – 23 August 1387) was king of Denmark as Olaf II (1376–1387) and king of Norway as Olaf IV (1380–1387). Olaf was son of King Haakon VI of Norway and the grandson of King Magnus IV of Sweden. His mother was Queen Margaret I of Denmark which made him the grandson of King Valdemar IV of Denmark. In addition to his claim on the thrones of Denmark and later Norway, he was in the direct succession line to the throne of Sweden (but for the interposition of Albert of Mecklenburg).

Olaf Haraldsen (died ) was a Danish anti-king who ruled Scania for a few years from 1139. He never won control over the rest of Denmark, and he is not included in the list of Danish monarchs used by the Danish monarchy or Den Store Danske Encyklopædi. He is sometimes called "Olaf II" even though there was a later Olaf II of Denmark.