Bogusław I, of the House of Griffins was Duke of Pomerania-Stettin from 1156 to 1187, he was first married to Walburgis (d. 1177), daughter of which King of Denmark from 1146 until his death in 1182?
Bogusław I, Duke of Pomerania Bogusław I (also Bogislaw and Boguslaus;  1130 – 18 March 1187 in Sosnitza near Altwarp) of the House of Griffins was Duke of Pomerania-Stettin from 1156 to 1187. He ruled the Duchy of Pomerania jointly with his brother Casimir I of Pomerania-Demmin. His father was Wartislaw I. He was first married to Walburgis (d. 1177), daughter of Valdemar I of Denmark and later to Anastasia, daughter of Mieszko III of Poland and Eudoxia of Kiev. With his second wife, he had 5 children.
Ingeborg of Mecklenburg-Schwerin Ingeborg of Mecklenburg (1343/45 – 25 July 1395) was a daughter of Albert II, Duke of Mecklenburg and his wife, Euphemia of Sweden. Euphemia was a daughter of Ingeborg of Norway, who was the only legitimate child of King Haakon V of Norway. Thus, Ingeborg of Mecklenburg was Haakon V's great-granddaughter.