Question: Who was the most famous king of the House of Griffins, and King of Sweden, Denmark and Norway in the 14th and 15th centuries?
Sentence (from "Eric of Pomerania"): Eric of Pomerania KG (1381 or 1382 – 24 September 1459) was King Eric (Eirik) III of Norway (1389–1442), King Eric VII of Denmark (1396–1439), and King Eric ("Ericus") of Sweden (1396–1439), in all three known mainly as "Erik af/av Pommern".
Relevant evidence: Yes