Ingeborg of Mecklenburg (1343/45 – 25 July 1395) was a daughter of Albert II, Duke of Mecklenburg, and Euphemia of Sweden. Through her mother, she was a great-granddaughter of King Haakon V of Norway and a great-granddaughter of King Magnus Ladulås of Sweden.
In 1360, she married Louis VI "the Roman" of Bavaria, becoming his second wife. The marriage was childless.
After Louis's death, she married Henry II, Count of Holstein-Rendsburg. They had at least four children:
Gerhard VI, Count of Holstein;Helge bei der Wieden calls him Gerhard V. married Catherine Elisabeth of Brunswick-Lüneburg in 1391 and had issue Albert II, Count of Holstein-Rendsburg Henry III, Count of Schauenburg-Holstein (died 1421), Prince-Bishop of Osnabrück as Henry I Sophia of Holstein (1375, Lübeck – 1448); married Bogislaw VIII, Duke of Pomerania (1364–1418) in 1398 and had issue
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