Alexander was King of Greece from 11 June 1917 until his death in 1920.
The second son of King Constantine I, Alexander was born in the summer palace of Tatoi on the outskirts of Athens. Wikipedia
Born: August 1, 1893, Tatoi Palace, Greece
Died: October 25, 1920 (age 27 years), Athens, Greece
Siblings: George II of Greece, Paul of Greece, Helen of Greece and Denmark, and more
Children: Alexandra of Yugoslavia
Spouse: Aspasia Manos (m. 1919–1920)
Parents: Constantine I of Greece and Sophia of Prussia