About Prince Nicholas of Greece and Denmark
Prince Nicholas of Greece and Denmark (Greek: Νικόλαος, romanized: Nikólaos; 22 January 1872 – 8 February 1938) was the fourth child and third son of King George I of Greece, and of Queen Olga. He was known as "Greek Nicky" within the family to distinguish him from his cousin Emperor Nicholas II of Russia (first cousin on the paternal side and second cousin on the maternal side). Prince Nicholas was a talented painter, often signing his works as "Nicolas Leprince". Along with his elder brothers Constantine and George, Nicholas helped to organize the 1896 Summer Olympics in Athens, the first to be held since 393.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.