Title: Frederick IV, Elector Palatine
Content:  Frederick IV, Elector Palatine of the Rhine (Kurfürst Friedrich IV. von der Pfalz; 5 March 1574 &ndash; 19 September 1610), only surviving son of Louis VI, Elector Palatine and Elisabeth of Hesse, called "Frederick the Righteous" (Friedrich Der Aufrichtige; French: Frédéric IV le juste).
Title: Frederick IV, Elector Palatine
Content:  Born in Amberg, his father died in October 1583 and Frederick came under the guardianship of his uncle, John Casimir, an ardent Calvinist. The Calvinist mathematician and astronomer Bartholemaeus Pitiscus served as Frederick's tutor and later became court preacher. In January 1592, Frederick assumed control of the government of the Electorate of the Palatinate upon the death of John Casimir. Frederick continued John Casimir's anti-Catholic measures and in 1608 became the head of the Protestant military alliance known as the Protestant Union. He soon fell prey to alcoholism, leaving state matters largely to his chief minister Christian of Anhalt. Frederick IV died in 1610 in Heidelberg.
Title: Frederick V of the Palatinate
Content:  On 19 September 1610, Frederick's father, Frederick IV, died from "extravagant living"; his son being 14 years old at the time. Under the terms of the Golden Bull of 1356, Frederick's closest male relative would serve as his guardian and as regent of the Palatinate until Frederick reached the age of majority. However, his nearest male relative, Wolfgang William, Count Palatine of Neuburg, was a Catholic, so, shortly before his death, Frederick IV had named another Wittelsbach, John II, Count Palatine of Zweibrücken, as his son's guardian. Frederick V welcomed John to Heidelberg, whereas Wolfgang William was denied entry. This led to a heated dispute among the princes of the Holy Roman Empire. In 1613, Matthias, Holy Roman Emperor intervened in the dispute, with the result being that Frederick V was able to begin his personal rule in the Palatinate even though he was still underage. The dispute ended in 1614, when Frederick attained his eighteenth birthday. However, much bad blood among the houses was caused by this dispute.
Title: Frederick I, Elector Palatine
Content:  He was a son of Louis III, Elector Palatine and his second wife Matilda of Savoy. His maternal grandparents were Amadeus, Prince of Achaea and his wife Catherina of Geneva. He ruled the Electoral Palatinate after the death of his brother Louis IV as regent for his nephew Philip, Elector Palatine. He adopted his nephew in 1451 and refused to marry. From this "Arrogation," he claimed the right to be the legitimate elector. As this action was against imperial law, Emperor Frederick III refused to confirm Frederick's status. However, the emperor did not manage to displace Frederick who was an able strategist and allied with Louis IX, Duke of Bavaria. Frederick was also successful against other opponents such as the emperor's party follower Albrecht III Achilles, Elector of Brandenburg and Diether von Isenburg, the archbishop of Mainz, and increased his territory. With the Battle of Seckenheim during the Bavarian War (1459–63) Frederick captured his antagonists Bishop George of Baden, Charles I, Margrave of Baden-Baden and Ulrich V, Count of Württemberg.
Title: Frederick IV, Elector Palatine
Content: Luise Juliane of the Palatinate (Heidelberg, 16 July 1594 - Meisenheim, 28 April 1640); married in 1612 to Pfalzgraf John II, Count Palatine of Zweibrücken. ; Katharina Sofie of the Palatinate (Heidelberg, 10 June 1595 - Köln an der Spree, 28 June 1626). ; Frederick V, Elector Palatine (Jagdschloß Deinschwang, 16 August 1596 - Mainz, 29 November 1632). ; Elisabeth Charlotte of the Palatinate (Neumarkt, 19 November 1597 - Crossen an der Oder, 26 April 1660); married in 1616 to Elector George William of Brandenburg. ; Anna Eleonore of the Palatinate (Heidelberg, 4 January 1599 - Heidelberg, 10 October 1600). ; Louis William of the Palatinate (Heidelberg, 5 August 1600 - Heidelberg, 10 October 1600). ; Maurice Christian of the Palatinate (Heidelberg, 18 September 1601 - Heidelberg, 28 March 1605). ; Louis Philip, Count Palatine of Simmern-Kaiserslautern (Heidelberg, 23 November 1602 - Krossen, 6 January 1655). In 1593 he married Louise Juliana of Nassau, the daughter of William I of Orange and Charlotte de Bourbon-Monpensier. They had eight children:
Title: Frederick V of the Palatinate
Content:  Frederick was born on 26 August 1596 was born at the hunting lodge (Jagdschloss) in Deinschwang, Palatinate (present-day Lauterhofen, Germany). His father, Frederick IV, was the ruler of Electoral Palatinate; his mother was Louise Juliana of Nassau, the daughter of William I of Orange and Charlotte de Bourbon-Monpensier. Frederick was related to almost all of the ruling families of the Holy Roman Empire and a number of diplomats and dignitaries attended his baptism at Amberg on 6 October 1596. The Palatine Simmerns, a cadet branch of the House of Wittelsbach, were noted for their attachment to Calvinism; this was in marked contrast to the other main line of Wittelsbachs, headed by Duke Maximilian, which was deeply devoted to the Roman Catholic Church. The capital of the Palatinate, Heidelberg, was suffering from 
Title: Frederick IV, Duke of Holstein-Gottorp
Content:  Frederick IV (18 October 1671 &ndash; 19 July 1702) was the reigning Duke of Holstein-Gottorp. He was born in Gottorf Castle as the elder son of Duke Christian Albert of Holstein-Gottorp and Princess Frederica Amalia of Denmark. He was married on 12 May 1698 to Princess Hedwig Sophia of Sweden and they had an only child, Charles Frederick, who eventually fathered the future Tsar Peter III of Russia, therefore making Frederick a patrilineal ancestor to all Russian emperors after Catherine II. He took part in the Great Northern War and was killed by artillery fire in the Battle of Kliszów in Poland. 
Title: Frederick II, Elector Palatine
Content:  In March 1544, Frederick succeeded his brother Louis V as Prince-elector of the Palatinate. He introduced the Protestant Reformation and was therefore outlawed by Emperor Charles V until Frederick submitted. He was succeeded by his former ward Otto Henry. He died in February 1556 in Alzey.
Title: Frederick V of the Palatinate
Content:   Frederick V (Friedrich, Fridrich; 26 August 1596 – 29 November 1632) was the Elector Palatine of the Rhine in the Holy Roman Empire from 1610 to 1623, and reigned as King of Bohemia from 1619 to 1620. He was forced to abdicate both roles, and the brevity of his reign in Bohemia earned him the derisive sobriquet "the Winter King" (Czech: Zimní král; German: Winterkönig). Frederick was born at the hunting lodge (Jagdschloss) in Deinschwang, Palatinate (present-day Lauterhofen, Germany). He was the son of Frederick IV and of Louise Juliana of Orange-Nassau, the daughter of William the Silent and Charlotte de Bourbon-Montpensier. An intellectual, a mystic, and a Calvinist, he succeeded his father as Prince-Elector of the Rhenish Palatinate in 1610. He was responsible for the construction of the famous Hortus Palatinus 
Title: Frederick II, Elector Palatine
Content:  Frederick was born at Winzingen Castle near Neustadt an der Weinstraße as the fourth son of Philip, Elector Palatine and Margarete of Bavaria-Landshut. He was the Duke Count Palatine and served as counselor and general for Charles V, Holy Roman Emperor, commanding expeditions against the Turks in 1529 and 1532, and assisting the Emperor at the Diet of Augsburg in 1530. In 1535, he married in Heidelberg to Dorothea of Denmark. In 1517, he had declared his love suit to the Habsburg Princess Eleanor of Austria, but this was discovered by her brother Charles V, then duke of Burgundy and king of Spain, resulting in Count Frederick being temporarily banished from court until he returned after announcing to Charles his Imperial election in 1519. He was custodian of the young dukes of Palatinate-Neuburg Otto Henry and Philip and then served as general for the Habsburg Ferdinand I.

Question: Who is the father of Frederick IV, Elector Palatine?
Answer: Louis VI.