Standing from left to right: King Haakon VII of Norway, King Ferdinand of Bulgaria, King Manuel of Portugal, Kaiser Wilhelm II of the German Empire, King George I of The Hellenes (Greece) and King Albert I of the Belgians (Belgium). Seated from left to right: King Alfonso XIII of Spain, King-Emperor George V of the Great Britain and King Frederick VIII of Denmark.
There are several family relations in that picture. For instance, Frederik VIII of Denmark (bottom right) was the father of Haakon VII of Norway (top left), while Wilhelm II of Germany (top, 3rd from the right) was first cousin of both George V of the United Kingdom (bottom center), and Queen Maud of Norway who was wife to Haakon VII of Norway and sister to George V of the United Kingdom – which made Haakon VII of Norway and George V of the United Kingdom brother-in-laws. George V of the United Kingdom’s and Queen Maud of Norway’s mother was incidentally Alexandra of Denmark, sister to Frederik VIII of Denmark. This means that Frederik VIII of Denmark was also the uncle of George V of the United Kingdom.
George was a grandson of Queen Victoria and Prince Albert and the first cousin of Tsar Nicholas II of Russia and Kaiser Wilhelm II of Germany. The funeral of King Edward VII was the last time all of the great European monarchs would meet before the First World War, the same war that would end most of the monarchical lines of Europe for good. Imagine, they all knew a war was coming, all knew it was going to be between them. Looking at this picture really makes one realize how much the First World War was the result of national egos embodied by monarchs. And just how full of nonsense they were with any sense of honor or duty to their states.