The Familial Ties of King Charles III to the Crowned Heads of Europe

A portrait of King Charles III as Prince of Wales by artist Susan Crawford.
Copyright of the Royal Collection Trust.

King Charles III of the United Kingdom is a cousin to all of the other nine European hereditary monarchs.

Philippe and Charles.
Photo (c) Getty Images / John Thys.

King Charles III of the United Kingdom (b.1948) and King Philippe of Belgium (b.1960) are third cousins once removed. Both are descendants of King Christian IX of Denmark (1818-1906) and Queen Louise (1817-1898; née Hesse-Kassel). 

King Christian IX of Denmark -> King George I of Greece -> Prince Andrew of Greece -> Prince Philip of Greece and Denmark -> King Charles III of the United Kingdom

King Christian IX of Denmark -> King Frederik VIII of Denmark -> Princess Ingeborg of Denmark -> Princess Astrid of Sweden -> King Albert II of Belgium -> King Philippe of Belgium

Charles and Margrethe.

King Charles III of the United Kingdom (b.1948) and Queen Margrethe II of Denmark (b.1940) are third cousins. Both are descendants of King Christian IX of Denmark (1818-1906) and Queen Louise (1817-1898; née Hesse-Kassel). 

King Christian IX of Denmark -> King George I of Greece -> Prince Andrew of Greece and Denmark -> Prince Philip of Greece and Denmark -> King Charles III of the United Kingdom

King Christian IX of Denmark -> King Frederik VIII of Denmark -> King Christian X of Denmark -> King Frederik IX of Denmark -> Queen Margrethe II of Denmark

Hans Adam, Marie Aglae, Diana, and Charles.

King Charles III of the United Kingdom (b.1948) and Prince Hans Adam II of Liechtenstein (b.1945) are fifth cousins. Both are descendants of Hereditary Prince Karl Ludwig of Baden (1755-1801) and Hereditary Princess Amalie Friederike (1754-1832; née Hessen-Darmstadt). 

Hereditary Prince Karl Ludwig of Baden -> Princess Wilhemine of Baden -> Prince Alexander of Hesse and by Rhine -> Prince Louis of Battenberg -> Princess Alice of Battenberg -> Prince Philip of Greece and Denmark -> King Charles III of the United Kingdom
Hereditary Prince Karl Ludwig of Baden -> Princess Karoline of Baden -> Princess Sophie of Bavaria -> Archduke Karl Ludwig of Bavaria -> Archduchess Elisabeth of Austria -> Prince Franz Josef II of Liechtenstein -> Prince Hans Adam II of Liechtenstein 
Camilla, Charles, and Henri.
Photo (c) AGE Fotostock.

King Charles III of the United Kingdom (b.1948) and Grand Duke Henri of Luxembourg (b.1960) are third cousins once removed. Both are descendants of King Christian IX of Denmark (1818-1906) and Queen Louise (1817-1898; née Hesse-Kassel). 

King Christian IX of Denmark -> King George I of Greece -> Prince Andrew of Greece and Denmark -> Prince Philip of Greece and Denmark -> King Charles III of the United Kingdom

King Christian IX of Denmark -> King Frederik VIII of Denmark -> Princess Ingeborg of Denmark -> Princess Astrid of Sweden -> Princess Joséphine-Charlotte of Belgium -> Grand Duke Henri of Luxembourg

Charles and Albert.

King Charles III of the United Kingdom (b.1948) and Prince Albert II of Monaco (b.1958) are fifth cousins once removed. Both are descendants of Hereditary Prince Karl Ludwig of Baden (1755-1801) and Hereditary Princess Amalie Friederike (1754-1832; née Hessen-Darmstadt). 

Hereditary Prince Karl Ludwig of Baden -> Princess Wilhemine of Baden -> Prince Alexander of Hesse and by Rhine -> Prince Louis of Battenberg -> Princess Alice of Battenberg -> Prince Philip of Greece and Denmark -> King Charles III of the United Kingdom
Hereditary Prince Karl Ludwig of Baden -> Grand Duke Karl Ludwig of Baden -> Princess Marie Elisabeth of Baden -> Lady Mary Douglas-Hamilton -> Prince Louis II of Monaco -> Princess Charlotte of Monaco -> Prince Rainier III of Monaco -> Prince Albert II of Monaco
Charles and Willem-Alexander with Máxima.

King Charles III of the United Kingdom (b.1948) and King Willem-Alexander of the Netherlands (b.1968) are fifth cousins. Both are descendants of Emperor Paul of Russia (1751-1804) and Empress Maria (1759-1828; née Württemberg). 

Emperor Paul of Russia -> Emperor Nicholas I of Russia -> Grand Duke Konstantin of Russia -> Grand Duchess Olga of Russia -> Prince Andrew of Greece and Denmark -> Prince Philip of Greece and Denmark -> King Charles III of the United Kingdom
Emperor Paul of Russia -> Grand Duchess Anna of Russia -> King Willem III of the Netherlands -> Queen Wilhemina of the Netherlands -> Queen Juliana of the Netherlands -> Queen Beatrix of the Netherlands -> King Willem-Alexander of the Netherlands
Charles and Harald.

King Charles III of the United Kingdom (b.1948) and King Harald V of Norway (b.1937) are second cousins once removed. Both are descendants of King Edward VII of the United Kingdom (1841-1910) and Queen Alexandra (1844-1925; née Denmark). 

King Edward VII of the United Kingdom -> King George V -> King George VI -> Queen Elizabeth II -> King Charles III of the United Kingdom

King Edward VII of the United Kingdom -> Princess Maud -> King Olav V of Norway -> King Harald V of Norway

Charles and Felipe.

King Charles III of the United Kingdom (b.1948) and King Felipe VI of Spain (b.1968) are second cousins once removed. Both are descendants of King George I of Greece (1845-1913) and Queen Olga (1851-1926; née Russia). 

King George I of Greece -> Prince Andrew of Greece -> Prince Philip of Greece and Denmark -> King Charles III of the United Kingdom
King George I of Greece -> King Constantine I of Greece -> King Paul of Greece -> Princess Sophia of Greece and Denmark -> King Felipe VI of Spain
Carl Gustaf and Charles.

King Charles III of the United Kingdom (b.1948) and King Carl XVI Gustaf of Sweden (b.1946) are third cousins once removed, three times over. Both are descendants of Queen Victoria of the United Kingdom (1819-1901) and Prince Consort Albert (1819-1861; née Saxe-Coburg and Gotha). One of their lines of descent is as follows:

Queen Victoria of the United Kingdom -> King Edward VII -> King George V -> King George VI -> Queen Elizabeth II -> King Charles III of the United Kingdom
Queen Victoria of the United Kingdom -> Prince Arthur, Duke of Connaught -> Princess Margaret of Connaught -> Hereditary Prince Carl Gustaf of Sweden -> King Carl XVI Gustaf of Sweden
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