House of Mecklenburg, in which a princess of Sweden Euphemia, have ancestors there and (in several ways) in all ruling royal houses of Europe through her son Magnus I of Mecklenburg and grandson Magnus II, Duke of Mecklenburg
Mecklenburg-Vorpommern | Duke University | Duke Ellington | Duke | Duke of Wellington | Mecklenburg | Prince William, Duke of Cambridge | Duke of York | Charlotte of Mecklenburg-Strelitz | Duke of Norfolk | Duke of Edinburgh | Duke of Burgundy | Prince Arthur, Duke of Connaught and Strathearn | George Villiers, 1st Duke of Buckingham | Prince Andrew, Duke of York | Duke of Northumberland | Alfred, Duke of Saxe-Coburg and Gotha | Prince Richard, Duke of Gloucester | Prince Frederick, Duke of York and Albany | Grand Duchy of Mecklenburg-Schwerin | George Duke | Charles Lennox, 2nd Duke of Richmond | Mecklenburg County, North Carolina | Louis Philippe II, Duke of Orléans | Edward Seymour, 1st Duke of Somerset | Philippe II, Duke of Orléans | John Frederick II, Duke of Saxony | Hugh Grosvenor, 2nd Duke of Westminster | George Monck, 1st Duke of Albemarle | Frederick Schomberg, 1st Duke of Schomberg |
Charles was born in Strelitz, the only son of the reigning Duke of Mecklenburg-Strelitz, Adolphus Frederick II, and his third wife, Princess Christiane Emilie of Schwarzburg-Sondershausen.
He was the son of Count Eric I of Hoya and his wife Helen, the daughter of Duke Magnus II Torquatus.
Magnus fled to his estates in Uppland in 1574, there displaying violence, wantoness and brutality.
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Rather than redeeming the estates, however, Magnus, further alienated ducal possessions, for instance selling the expectancy to the pawned estates of the bailiwick (Amt) of Tremsbüttel to Duke Adolphus of Holstein-Gottorp.
She was the daughter of Albert of Mecklenburg, King of Sweden and Duke of Mecklenburg, and Richardis of Schwerin.