The Grand Ducal House of Mecklenburg, the more common name for the House of Nikloting, was a North German dynasty that ruled until 1918.

Origins

Lords of the Vend tribe Obotrites. When the Holy Roman Empire expanded eastwards, notably to the coast of Baltic in 13th century, a portion of Obotrite lords allied with German leaders, and strengthened their own position in consequence. The mightiest of them were those who became first Lords of Mecklenburg (name derives from their main castle, Mikla Burg, big fortress). The main branch of the house was elevated in 1347 to ducal rank. They gradually became outwardly more German, preserving their ruling position. The Obotrites (sometimes Abodrites, Obodrites) were a group of Slavic peoples who had in the 6th century settled in the regions later known as Mecklenburg and Schleswig-Holstein in what is now north-eastern Germany. ...

Claims to Swedish throne

The Dukes of Mecklenburg pursued from 14th century a claim to inheritance in Sweden: The Duke of Mecklenburg was a descendant and the heir of two women whom legends tied to Scandinavian royal houses.

• Duke Henry II of Mecklenburg's paternal great-grandmother, a Scandinavian noblewoman named Christina, who was the wife of Henry Borwin II of Mecklenburg (d 1226), was a daughter of King Sverker II of Sweden by his first wife. Christina was the mother of John I of Mecklenburg, whose son was Henry I of Mecklenburg.
• Duke Henry II of Mecklenburg's maternal grandmother, a lady named Marianna, who was the first wife of Duke Barnim I of Pomerania (d 1278), lord of Wolgast, was a sister of King Erik XI of Sweden. Marianna had given birth to an only surviving child, daughter named Anastasia of Pomerania, who then became the wife of Henry I of Mecklenburg (d 1302) and mother of Henry II.

The Sverker dynasty had long been extinct, having lost the throne ultimately to Eric XI. The male dynasty of Eric X was also now extinct, and issue of his other daughters had been sidestepped by Birger Jarl, the husband of his daughter (the only who yet in 1250 lived), Ingeborg Eriksdotter of Sweden. Birger took care to secure the kingship to his own sons. This article or section does not adequately cite its references or sources. ... After the extinction of the House of Stenkil and the coronation of Sverker I of Sweden in 1130, a civil war commenced. ... The house of St Eric was one of the two noble families, dynasties, which rivalled for the kingship of Sweden between 1150 and 1220. ... This article or section does not adequately cite its references or sources. ... Duchess Ingeborg Eriksdotter (c 1212 - c 1254) was first wife of Birger jarl, eldest sister of king Eric XI of Sweden, and since 1250 sort of Queen Mother of Sweden. ...

Claim became reality for a brief reign: Henry II's son Albert II, Duke of Mecklenburg (1318-79) married a kinswoman, a Scandinavian heiress Euphemia of Sweden and Norway (born 1317 and died 1370). The couple's second son duke Albert III deposed his uncle from the Swedish throne, and ascended as King. Eufemia Ericsdotter, Duchess Consort of Mecklenburg, was born as a heiress of Sweden and of Norway, in 1317, and died sometime in 1370. ... Albert of Sweden (or Albrecht von Mecklenburg in German or Albrekt av Mecklenburg in Swedish) was born in 1338 and became king of Sweden in 1363. ...

The Regent-Queen Margaret chose Eric of Pomerania as her heir. Eric descended from the elder brother of Albert III. Monarchs of the Kalmar union were all cognatic descendants of the House of Mecklenburg. for Queens Margaret of Denmark, see Queen Margaret of Denmark, and for a namesake queen consort of Scotland, see Margaret of Denmark Margaret Valdemarsdatter (Norwegian: Margrete Valdemarsdotter) (1353 - October 28, 1412) was Queen of Norway, Regent of Denmark and Sweden, and founder of the Kalmar Union which joined the Scandinavian... Eric of Pomerania A caricature of the king, the only contemporary likeness of him in existence Eric of Pomerania, Erik af Pommern, Erik VII (Danish title), Erik av Pommern (Eirik III) (Norwegian title) Erik av Pommern (Eric XIII) (Swedish title) or Eryk Pomorski (Polish title), was adopted by Margaret I...

The agnatic House of Mecklenburg, descended from Euphemia's youngest son Magnus I, Duke of Mecklenburg, continued to keep their claim to the throne, and occasionally stirred the situation in Scandinavia.

Claims to Norway

This country, the Hereditary Kingdom of Norway, has been the only medieval Scandinavian realm whose kingship was hereditary, not elective. Already when Olav IV of Norway was little and his mother Margaret was regent, the Dukes of Mecklenburg advanced their claims. Kingdom of Norway as an united realm, was founded by King Harald I (the Fairhair, harfagri) in 9th century, who conquered a number of local kingdoms. ... Olaf IV Haakonsson, (1370 - August 23, 1387), King of Norway and Denmark, son of Haakon VI of Norway and Margaret of Denmark. ...

The right is based on their descent from Euphemia of Sweden, granddaughter of Haakon V of Norway. Eufemia Ericsdotter, Duchess Consort of Mecklenburg, was born as a heiress of Sweden and of Norway, in 1317, and died sometime in 1370. ... Burial site of HÃ¥kon V in Oslo Haakon V Magnusson (1270 - May 8, 1319) was king of Norway from 1299 until 1319. ...

When Olav IV died in 1387, Norway was without a monarch, under the government of the regentess Margaret. She soon chose a heir, Eric of Pomerania, whose mother Maria of Mecklenburg had been Eufemia's eldest granddaughter. Maria's uncle, Margaret's old opponent was left without. Eric of Pomerania A caricature of the king, the only contemporary likeness of him in existence Eric of Pomerania, Erik af Pommern, Erik VII (Danish title), Erik av Pommern (Eirik III) (Norwegian title) Erik av Pommern (Eric XIII) (Swedish title) or Eryk Pomorski (Polish title), was adopted by Margaret I...

When Eric's nephew king Christopher died (before the death of the deposed Eric III of Norway), after some hiatus another magnate, Christian VIII of Oldenburg, of a female descent from Eufemia and the Mecklenburg (Eufemia's daughter's great-grandson), was in 1450 chosen as king of Norway, this time surpassing his cousin and male-line rival, Duke Henry the Fat of Mecklenburg. A contemporary caricature of the king Eric of Pomerania, Erik af Pommern, Erik VII (Danish title), Erik av Pommern (Eirik III) (Norwegian title) Erik av Pommern (Eric XIII) (Swedish title) or Eryk Pomorski (Polish title), was king of Norway (1389 – 1440), elected king of Denmark (1412 – 1439), and of Sweden...

The Dukes of Mecklenburg continued to regard themselves as rightful heirs of Norway, however they were unable to gain the kingdom from the Oldenburgs.

Modern states in Mecklenburg

In c 1711, a treaty was made between Dukes of Mecklenburg and the Elector of Brandenburg, through which the elector was recognized as the next heir of Mecklenburg after the male lines of the genealogical house of Mecklenburg. Whereby the electors, later kings of Prussia, regarded themselves as having become members of the House of Mecklenburg and started to use its titles, e.g Duke of Mecklenburg, among their own titulary.

The legality of that treaty concession has been and is under discussion, because not each of the then agnates of the House participated in the deed, and at least one of them was then underage.

In 17th and 18th centuries, the duchy was divided several times between agnates of the ducal house. Mecklenburg-Schwerin, Mecklenburg-Gustrow, Mecklenburg-Grabow and Mecklenburg-Strelitz were typical partition principalities. Until the late 18th century, most parts had returned to the senior branch (Schwerin), after which the patrimony was divided in two states until the very end of monarchy in Germany:

• Mecklenburg-Schwerin

• Mecklenburg-Strelitz

These were elevated to grand duchies by recognition of the Congress of Vienna. In 1918, less than a year before the elimination of monarchy, the main line of Strelitz went extinct and the then Grand Duke of Mecklenburg-Schwerin stepped in as regent, but succession unclarities (there was a junior Strelitz branch yet living in Russia) were not solved until the small monarchies both were dissolved to republics. Mecklenburg-Schwerin was a Duchy (from 1815 a Grand Duchy) in northeastern Germany, formed by a partition of the Duchy of Mecklenburg. ... Mecklenburg-Strelitz was a duchy in northern Germany, roughly consisting of the present day district of Mecklenburg-Strelitz (the historical Stargarder Land), bordering areas of modern-day Brandenburg with the town of Fürstenberg and the area around Ratzeburg in modern Schleswig-Holstein. ... The Congress of Vienna by Jean-Baptiste Isabey, 1819. ...

Slavic heritage

The house of Mecklenburg was originally a tribal chieftain dynasty of Slavic Obotrites, who gradually became Germanized. In the beginning of 20th century, its Slavic roots were remembered for example by king Nicholas I of Montenegro who chose Jutta of Mecklenburg as the wife of his heir-apparent, Danilo, Crown Prince of Montenegro, stating the Slavic ethnicity of the Mecklenburg as sufficient. King Nikola I King Nikola I Petrović Njegoš (Serbian Cyrillic: Краљ Никола I Петровић Његош) (October 7, 1841- March 2, 1921) was the only king of Montenegro, reigning as a king from 1910 to 1918 and as a prince from 1860 to 1910. ... Danilo I Aleksander Petrović-Njegoš (Anglicised: Daniel I Alexander Petrovich-Niegosh) (1871 - 1939) was the Prince of Montenegro. ...