Niklot was a lord of the Wendish tribe of 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.
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 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 Eric XI of Sweden. Marianna had given birth to an only surviving child, daughter named Anastasia of Pomerania, who then became the......