Konstanty Kruglowski was born on January 3, 1885, in Vilnius, Lithuania, Russian Empire [now Lithuania].
Konstanty Kruglowski died on January 23, 1966, in Gorzw Wielkopolski, Lubuskie, Poland.
Konstanty Zakrzewski was born in 1876.
Konstanty Brandel was born in 1880.
Konstanty Kalinowski was born in 1838.
Konstanty Hrynakowski was born in 1878.
Konstanty Jeleński was born in 1922.
Konstanty Skirmunt was born in 1866.
Konstanty Jelski was born in 1837.
Konstanty Plisowski was born in 1890.
Konstanty Górski was born in 1868.
Konstanty Laszczka was born in 1865.
Konstanty Tyszkiewicz was born in 1806.