Title: John VII, Duke of Mecklenburg-Schwerin
Content:  Johann VII of Mecklenburg (7 March 1558 – 22 March 1592) (sometimes called Johann V, and usually translated to John VII or John V) was a Duke of Mecklenburg-Schwerin. Johann was the son of John Albert I, Duke of Mecklenburg-Güstrow and Schwerin (1525–1576), and his wife Duchess Anna Sophia of Prussia (1527–1591). He was eighteen years old when his father died. A regency council was appointed that ruled in his name for the next nine years. The regency handed over the actual rule of his territories to him in 1585. He immediately faced problems he was ill-equipped to deal with, including massive debt and his uncle Christopher's demands for territorial concessions. After an especially harsh argument with his uncle, he committed suicide. Since suicides could not be buried in hallowed ground, a story was concocted which alleged that Johann had been killed by the devil as part of a pact with two women from Schwerin. The women were questioned: Katharina Wankelmuth, who died from the effects of torture, and Magdalena Rukitz, who was burned at the stake. Their condemnation as witches cleared the way for Johann's burial in Schwerin Cathedral.
Title: John V, Duke of Mecklenburg
Content:  John V of Mecklenburg (1418 &ndash; 1 November 1442/13 January 1443) was Duke of Mecklenburg from 1436 to 1442. John was the son of the Duke John IV of Mecklenburg and Catherine of Saxe-Lauenburg. He ruled Mecklenburg-Schwerin after the death of his father, initially under regency of his mother Catherine, then from 1436 along with his brother Henry IV. On 17 September 1436 he married Anna of Pomerania-Stettin (died after 14 May 1447), the daughter of Casimir V, Duke of Pomerania. He was probably buried in the Doberan Minster in Bad Doberan.
Title: John IV, Duke of Mecklenburg
Content: Henry IV, the Fat, Duke of Mecklenburg (1417–1477) ; John V, Duke of Mecklenburg (1422–1442) John married twice: first to Countess Jutta of Hoya, who died in 1415, and secondly, in 1416, to Catherine, daughter of Duke Eric IV of Saxe-Lauenburg. Catherine's first marriage had been with John VII of Werle, who died in 1414. John had two sons:
Title: John I, Duke of Mecklenburg-Stargard
Content:  He was probably the youngest child from the second marriage of Lord Henry II "the Lion" of Mecklenburg and Anna of Saxe-Wittenberg, a daughter of Duke Albert II of Saxe-Wittenberg.
Title: John VI, Duke of Mecklenburg
Content:  John VI, Duke of Mecklenburg (1439–1474) was a Duke of Mecklenburg.
Title: John VI, Duke of Mecklenburg
Content:  John was the second son of Henry IV, Duke of Mecklenburg, and his wife Dorothea, daughter of Elector Frederick I of Brandenburg. His earliest documented official act (jointly with the father) was in 1451. In 1464 he ruled an apanage of several districts jointly with his brother Albert VI, but did not participate actively in administering them. In 1472, John VI was engaged to Sophie, the daughter of Duke Eric II of Pomerania. The marriage was set to be celebrated in 1474. However, John VI died before the marriage took place. The exact date of his death is unknown; he is last mentioned in a document dated 20 May 1474. His last illness was contracted on a journey to Franconia to visit his uncle Elector Albrecht III Achilles of Brandenburg. In Kulmbach, he was infected with the plague and died. He was probably buried in Poor Clares monastery in Hof.
Title: Albert VI, Duke of Mecklenburg
Content:  Albert VI, Duke of Mecklenburg (Albrecht VI., Herzog zu Mecklenburg; 1438 - before 27 April 1483) was a Duke of Mecklenburg. Albert was the son of Henry IV, Duke of Mecklenburg, and Dorothea of Brandenburg, the daughter of the Elector Frederick I of Brandenburg. In 1464, he and his brother John VI received from their father the bailiwicks of Güstrow, Plau, Laage and Stavenhagen as a source of income. Albert was co-regent with his father until his father died in 1477. Thereafter, he was co-regent with his brother Magnus II. In 1479, his brother Balthasar, who had until then been Coadjutor of the 
Title: John IV, Duke of Mecklenburg
Content:  John IV, Duke of Mecklenburg (before 1370 &ndash; 16 October 1422) was sole ruler of the Duchy of Mecklenburg from 1384 to 1395 and co-regent from 1395 to 1422.
Title: Henry IV, Duke of Mecklenburg
Content:  Henry IV of Mecklenburg, because of his obesity and lavish lifestyle also called the "Henry the Fat", was the son of the Duke John IV of Mecklenburg and Catherine of Saxe-Lauenburg. He inherited Mecklenburg when his father died in 1422. His mother, Catherine, and his uncle, Albert V, acted as Regents until 1436. He then ruled jointly with his brother John V, until his brothers death in 1442. In May 1432, he married Dorothea of Brandenburg, the daughter of Elector Frederick I of Brandenburg. With the death of Prince William of Werle in 1436, the male line of the Werle branch of the House of Mecklenburg died 
Title: Duchy of Mecklenburg
Content: Henry IV and John VI (1471–1472) ; Henry IV (1472–1477) ; Magnus II, Albert VI and Balthasar (1477–1483) ; Magnus II and Balthasar (1483–1503) ; Balthasar, Eric II, Albrecht VII and Henry V, Duke of Mecklenburg (1503–1507) ; Eric II, Albrecht VII and Henry V, Duke of Mecklenburg (1508) ; Albrecht VII and Henry V, Duke of Mecklenburg (1508–1520) 

Question: Who is the father of Johann VII, Duke of Mecklenburg?
Answer: John Albert I, Duke of Mecklenburg.
Johann Albrecht I Herzog von Mecklenburg.