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?
Context: A carrack was a three- or four-masted ocean-going sailing ship that was developed in the 14th and 15th centuries in Europe.  Developed from the single-masted cog, the carrack was first used for European trade from the Mediterranean to the Baltic and quickly found use with the newly found wealth and status of the trans-Atlantic slave trade.  In its most advanced forms, it was used by the Portuguese for trade along the African coast and finally with Asia and America from the 15th century before evolving into the galleon of the 16th and 17th centuries. The House of Griffins or House of Pomerania (German: "Greifen" ; Polish: "Gryfici" ), also known as "House of Greifen", was a dynasty of dukes ruling the Duchy of Pomerania from the 12th century until 1637.  The name "Griffins" was used by the dynasty after the 15th century and had been taken from the ducal coat of arms.  Wartislaw I (around 1091 – died August 9, 1135) was the first historical ruler of the Duchy of Pomerania and the founder of the Griffin dynasty.  The most prominent Griffin was Eric of Pomerania, who became king of the Kalmar Union in 1397, thus ruling Denmark, Sweden and Norway.  The last Griffin duke of Pomerania was Bogislaw XIV, who died during the Thirty Years' War, which led to the division of Pomerania between Brandenburg-Prussia and Sweden.  Duchess Anna von Croy, daughter of Duke Bogislaw XIII and the last Griffin, died in 1660. The Kalmar Union was the personal union of the kingdoms of Denmark, Norway and Sweden during the 15th century.  The first king of the Kalmar Union was Eric of Pomerania.  His seal combined the coats of arms of Norway (center, as an inescutcheon upon a cross over all), Denmark (in dexter chief), Sweden (the Folkung lion, in dexter base) and Pomerania (a griffin, in sinister base), and in addition the Three Crowns symbol in sinister chief; the latter heraldic design predates the Kalmar Union, and is now mostly associated with the coat of arms of Sweden, but which during the 15th century came to represent the three kingdoms of the union. The Mlaschagna was a Ragusan noble family.  The founder was "Marinus f. Michaelis de Mascana" (1282–1313).  They did not play an important part in politics in the 14th and 15th centuries.  In the beginning of the 15th century Ragusan nobility were present in Novo Brdo as merchants or mining lords; Mlascagna were also present.  In the 14th century they held offices of mid-importance.  They were among the eleven smallest houses in the 15th century. This is a list of Swedish queens consort and spouses of Swedish monarchs and regents.  The list covers a large time span and the role of a consort has changed much over the centuries.  The first Swedish consorts are spoken of in legends.  The consorts until c. 1000 are often semi-legendary, as are the monarchs.  Between the 14th and 16th century, during periods of de facto Swedish independence from the formal union with Denmark, the Swedish regents did not have the title of king or queen, nor did the spouses of kings have the title of queen consort, although they had the equivalent position.  Due to unions with Finland, Denmark and Norway, many of the Swedish consorts were also consorts of monarchs of these countries.  Consorts listed during the period of 1380–1520 were in fact also consorts to monarchs of Denmark.  The consorts listed during the period of 1814-1905 were also consorts to monarchs of Norway.  Finland was from the Middle Ages a part of Sweden, and although there was no official title, such as "Queen Consort of Finland", from the 16th century until the year of 1809, the queen consort of Sweden also held the title "Grand Princess of Finland." Benveniste, is the surname, byname (see below - the origin of the name) in an old, noble, rich, and scholarly Jewish family of Narbonne, France and northern Spain from the 11th century.  The family was present in the 11th to the 15th centuries in Provence, France, Barcelona, Aragon and Castile' Spain.  Family members received honorary titles from the authorities and were members of the administration of the kingdom of Aragon and Castile.  They were the Baillie ("Bayle") - the Tax Officer and Treasurer, Alfaquim - Senior Advisor to the King and Royal Physician in Barcelona and Aragon in the 12th and 13th centuries.  They held the title of "Nasi" (prince in Hebrew), a name given to members of the House of David, in the Jewish communities (mainly Barcelona) and were prominent religious and secular leaders in the 11th to the 14th centuries.  In the 14th to the 15th century they held the titles of "Benveniste de la Cavalleria"—"of the knights" (a name given by the Templars to their treasurers and tax collectors) and Don—a noble person in Aragon and Castile.  After the expulsion of the Jews from Spain in 1492 they were dispersed mainly to Portugal, Greece - Salonica other parts of the Turkish Empire and North African countries.  In Portugal they were forced to convert to Christianity in 1497 and became one of the rich traders and bankers (the Mendes family) of Europe.  Today the name is borne by families in Europe, the Americas, Asia and Israel.  It was also used as a prænomen. The House of Kastrioti (Albanian: "Dera e Kastriotit" ) was an Albanian royal and noble family active in the 14th and 15th centuries as the rulers of the Principality of Kastrioti.  The first Kastrioti mentioned in historical documents was a kephale of Kaninë in 1368.  At the beginning of the 15th century the family controlled the region around Debar (modern westernmost Macedonia and easternmost Albania) at the end of the 14th and the beginning of the 15th century.  The most notable member was Skanderbeg, a magnate and general, regarded an Albanian national hero.  After the fall of the Principality and Skanderbeg's death in 1468 the Kastrioti family gave their allegiance to the Kingdom of Naples and were given control over the Duchy of San Pietro in Galatina and the County of Soleto in the Province of Lecce, Italy, where a maternal branch of the family still exists today as part of the Sanseverino family. 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".  He was the first King of the Nordic Kalmar Union, succeeding his adoptive mother Margaret I of Denmark, and was also Duke Eric I of Pomerania. Poetry has been featured extensively in Thai literature, and constituted the near-exclusive majority of literary works up to the early Rattanakosin period (early 19th century).  It consists of five main forms, known as "khlong", "chan", "kap", "klon" and "rai"; some of these developed indigenously while others were borrowed from other languages.  Thai poetry dates to the Sukhothai period (13th–14th centuries) and flourished under Ayutthaya (14th–18th centuries), during which it developed into its current forms.  Though many works were lost to the Burmese conquest of Ayutthaya in 1767, sponsorship by subsequent kings helped revive the art, with new works created by many great poets, including Sunthorn Phu (1786–1855).  Prose writing as a literary form was introduced as a Western import during the reign of King Mongkut (1851–68) and gradually gained popularity, though poetry saw a revival during the reign of King Vajiravudh (1910–25), who authored and sponsored both traditional poetry and the newer literary forms.  Poetry's popularity as a mainstream form of literature gradually declined afterwards, although it is still written and read, and is regularly employed ceremonially. Saint Yon, a family of Parisian butchers in the 14th and 15th centuries.  Guillaume de Saint Yon is cited as the richest butcher of the Grande Boucherie in the 14th century.  The family played an important role during the quarrels of the Armagnacs and Burgundians.  They were among the leaders of the Cabochien Revolt of 1413.  Driven out by the Armagnacs, they recovered their influence after the return of the Burgundians to Paris in 1418, but had to flee again in 1436 when the "constable", Arthur, Earl of Richmond, took the city.  Gamier de Saint Yon was "échevin" of Paris in 1413 and 1419; Jean de Saint Yon, his brother, was "valet de chambre" of the "dauphin" Louis, son of King Charles VI of France.  Both were in the service of the king of England during the English domination.  Richard de Saint Yon was master of the butchers of the Grande Boucherie in 1460.
Answer: Eric of Pomerania