Margaret I of Denmark
Olaf II of Denmark (December 1370 – 3 August 1387) was King of Denmark as "Olaf II" (though occasionally referred to as "Olaf III") from 1376 and King of Norway as Olaf IV from 1380 until his death. Olaf was the son of Queen Margaret I of Denmark and King Haakon VI of Norway, and grandson of kings Magnus IV of Sweden and Valdemar IV of Denmark.