Konstantin Päts was born on February 23, 1874.
Konstantin Bogaevsky was born on January 24, 1872.
Konstantin Feoktistov was born on February 7, 1926.
Konstantin Fehrenbach was born on January 11, 1852.
Konstantin Paustovsky was born on May 31, 1892.
Konstantin Savitsky was born on June 6, 1844.
Konstantin Lavronenko was born on April 20, 1961.
Konstantin Tsiolkovsky was born on September 5, 1857.
Konstantin-Assen was born on December 5, 1967.
Konstantin Sokolsky was born on December 7, 1904.
Konstantin Korovin was born on November 23, 1861.
Konstantin Aseev was born on October 20, 1960.
Konstantin Chernenko was born on September 24, 1911.