Jan Cieplinski was born on May 10, 1900, in Warsaw, Poland, Russian Empire [now Warsaw, Mazowieckie, Poland].
Janusz Czecz was born on March 3, 1928, in Zaborze, Malopolskie, Poland.
Jan Hawrylkiewicz was born on July 11, 1902, in Vilnius, Lithuania, Russian Empire [now Lithuania].
Jan January Janczak was born on October 1, 1938, in Sroda Wielkopolska, Wielkopolskie, Poland.
Ziemowit Janowski was born on May 23, 1959, in Bytom, Slaskie, Poland.
Jan Kochanowicz was born on June 23, 1879, in Wloclawek, Poland, Russian Empire [now Wloclawek, Kujawsko-Pomorskie, Poland].
Janusz Pichlak was born on February 9, 1946, in Siewierz, Slaskie, Poland.
Janusz Zakrzenski was born on March 8, 1936, in Przededworze, Kieleckie [now Swietokrzyskie], Poland.
Jan Hanford was born in 1953.
Jan Harrison was born in 1944.
Jan Goossens was born on 1958-12-18.
Jan Bruins was born in 1940.
Jan Smit was born on December 31, 1985.
Jan Huyghebaert was born in 1945.
Jan Bednarek was born in 1955.
Jan Remmers was born in 1922.
Jan Hřímalý was born in 1844.
Jan Remmelink was born in 1922.
Jan Coufal was born in 1978.
Jan Bondeson was born in 1962.