Kaiser Wilhelm II was the German Emperor from 1888-1918.
He was related to the leaders of two nations he eventually would engage in war. Wihelm, George V of Great Britain, and Nicholas II of Russia...
Kaiser Wilhelms sister Sophie was married to the heir to the throne of Greece. Also his cousin Alice was married to Andrew, the cousin of Sophie's husband (Alice and Andrew are the parents of Prince...
They were first cousins. Both were grandchildren of Queen Victoria of England Queen Victoria's daughter Victoria, aka Vicky, was Kaiser Wilhelm's mother.
Queen Victoria's son Edward VII was King...