Paternal Family Tree: Hohenzollern
On 24th December 1793 [his father] Frederick William III King Prussia [aged 23] and [his mother] Queen Louise of Prussia [aged 17] were married. He the son of [his grandfather] Frederick William II King Prussia [aged 49] and [his grandmother] Queen Frederica Louisa of Prussia [aged 42]. They were half second cousins. He a great x 5 grandson of King James I of England and Ireland and VI of Scotland.
On 15th October 1795 Frederick William IV King Prussia was born to Frederick William III King Prussia [aged 25] and Queen Louise of Prussia [aged 19].
On 16th November 1797 [his grandfather] Frederick William II King Prussia [aged 53] died. His son [his father] Frederick [aged 27] succeeded II King Prussia.
On 19th July 1810 [his mother] Queen Louise of Prussia [aged 34] died.
On 7th June 1840 [his father] Frederick William III King Prussia [aged 69] died. His son Frederick [aged 44] succeeded IV King Prussia.
On 2nd January 1861 Frederick William IV King Prussia [aged 65] died. His brother William [aged 63] succeeded I King Prussia.
Kings Wessex: Great x 22 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 20 Grand Son of Owain "Great" King Gwynedd
Kings Seisyllwg: Great x 26 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 21 Grand Son of Maredudd ap Bleddyn King Powys
Kings Godwinson: Great x 21 Grand Son of King Harold II of England
Kings England: Great x 6 Grand Son of King James I of England and Ireland and VI of Scotland
Kings Scotland: Great x 6 Grand Son of King James I of England and Ireland and VI of Scotland
Kings France: Great x 13 Grand Son of King Charles V of France
Kings Duke Aquitaine: Great x 26 Grand Son of Ranulf I Duke Aquitaine
Kings Spain: Great x 12 Grand Son of John II King Aragon
Great x 4 Grandfather: Frederick William "Great Elector" Hohenzollern Elector Brandenburg 6 x Great Grandson of John II King Aragon
Great x 3 Grandfather: Frederick I King Prussia 7 x Great Grandson of John II King Aragon
Great x 4 Grandmother: Luise Henriette Orange Nassau
Great x 2 Grandfather: Frederick William "Soldier King" I King Prussia 2 x Great Grandson of King James I of England and Ireland and VI of Scotland
Great x 4 Grandfather: Ernest Augustus Hanover Elector Brunswick-Lüneburg 
11 x Great Grandson of King Philip III of France
Great x 3 Grandmother: Sophia Charlotte Hanover Queen Consort Prussia Great Granddaughter of King James I of England and Ireland and VI of Scotland
Great x 4 Grandmother: Electress Sophia Palatinate Simmern 
Granddaughter of King James I of England and Ireland and VI of Scotland
Great x 1 Grandfather: Augustus William Hohenzollern 3 x Great Grandson of King James I of England and Ireland and VI of Scotland
Great x 4 Grandfather: Ernest Augustus Hanover Elector Brunswick-Lüneburg 11 x Great Grandson of King Philip III of France
Great x 3 Grandfather: King George I Great Grandson of King James I of England and Ireland and VI of Scotland
Great x 4 Grandmother: Electress Sophia Palatinate Simmern Granddaughter of King James I of England and Ireland and VI of Scotland
Great x 2 Grandmother: Sophia Dorothea Hanover Queen Consort Prussia 2 x Great Granddaughter of King James I of England and Ireland and VI of Scotland
Great x 4 Grandfather: George Wilhelm Hanover Duke Brunswick-Lüneburg 11 x Great Grandson of King Philip III of France
Great x 3 Grandmother: Sophia Dorothea of Celle 12 x Great Granddaughter of King Philip III of France
Great x 4 Grandmother: Eleonore Esmier D'Olbreuse Duchess Brunswick-Lüneburg
Grandfather: Frederick William II King Prussia 4 x Great Grandson of King James I of England and Ireland and VI of Scotland
father: Frederick William III King Prussia 5 x Great Grandson of King James I of England and Ireland and VI of Scotland
Great x 4 Grandfather: Louis VI Landgrave of Hesse Darmstadt 6 x Great Grandson of John II King Aragon
Great x 3 Grandfather: Landgrave Ernest Louis of Hesse-Darmstadt 7 x Great Grandson of John II King Aragon
Great x 2 Grandfather: Landgrave Louis VIII of Hesse-Darmstadt 8 x Great Grandson of John II King Aragon
Great x 1 Grandfather: Landgrave Louis IX of Hesse-Darmstadt 9 x Great Grandson of John II King Aragon
Grandmother: Queen Frederica Louisa of Prussia 10 x Great Granddaughter of John II King Aragon
Great x 2 Grandfather: Count Palatine Christian III of Zweibrücken
Great x 1 Grandmother: Countess Palatine Caroline of Zweibrücken
Frederick William IV King Prussia 6 x Great Grandson of King James I of England and Ireland and VI of Scotland
Great x 4 Grandfather: Duke John VII of Mecklenburg-Schwerin 9 x Great Grandson of King Philip III of France
Great x 3 Grandfather: Duke Adolphus Frederick I of Mecklenburg-Schwerin 10 x Great Grandson of King Philip III of France
Great x 4 Grandmother: Sophia Oldenburg 
9 x Great Granddaughter of King Philip III of France
Great x 2 Grandfather: Duke Adolphus Frederick II of Mecklenburg-Strelitz 11 x Great Grandson of King Philip III of France
Great x 4 Grandfather: Julius Ernst Duke of Brunswick-Dannenberg 12 x Great Grandson of King Henry "Curtmantle" II of England
Great x 3 Grandmother: Maria Katharina 13 x Great Granddaughter of King Henry "Curtmantle" II of England
Great x 1 Grandfather: Charles Louis Frederick Duke of Mecklenburg 12 x Great Grandson of King Philip III of France
Great x 4 Grandfather: Anton Günther I Count of Schwarzburg-Sondershausen
Great x 3 Grandfather: Christian William I Prince of Schwarzburg-Sondershausen
Great x 2 Grandmother: Christiane Emilie of Schwarzburg-Sondershausen
Grandfather: Grand Duke Charles II of Mecklenburg Strelitz 10 x Great Grandson of John II King Aragon
Great x 4 Grandfather: Ernest "The Pious" Saxe Gotha I Duke Saxe Gotha 11 x Great Grandson of King Louis VIII of France
Great x 3 Grandfather: Ernest Saxe Gotha 7 x Great Grandson of John II King Aragon
Great x 4 Grandmother: Elisabeth Sophie Saxe Altenburg Duchess Saxe Gotha 6 x Great Granddaughter of John II King Aragon
Great x 2 Grandfather: Ernest Frederick Duke of Saxe-Hildburghausen 8 x Great Grandson of John II King Aragon
Great x 1 Grandmother: Princess Elisabeth Albertine of Saxe-Hildburghausen 9 x Great Granddaughter of John II King Aragon
Great x 4 Grandfather: George Albert Count of Erbach-Schönberg
Great x 3 Grandfather: George Louis I Count of Erbach-Erbach
Great x 2 Grandmother: Countess Sophia Albertine of Erbach-Erbach
mother: Queen Louise of Prussia 11 x Great Granddaughter of John II King Aragon
Great x 4 Grandfather: Louis VI Landgrave of Hesse Darmstadt 6 x Great Grandson of John II King Aragon
Great x 3 Grandfather: Landgrave Ernest Louis of Hesse-Darmstadt 7 x Great Grandson of John II King Aragon
Great x 2 Grandfather: Landgrave Louis VIII of Hesse-Darmstadt 8 x Great Grandson of John II King Aragon
Great x 1 Grandfather: Prince George William of Hesse-Darmstadt 9 x Great Grandson of John II King Aragon
Grandmother: Princess Friederike of Hesse-Darmstadt 10 x Great Granddaughter of John II King Aragon
Great x 1 Grandmother: Countess Maria Louise Albertine of Leiningen-Dagsburg-Falkenburg