Jan Hein Donner vs Nicolaas Cortlever
Hoogovens Beverwijk NED round 1 1953.01.06
Ruy Lopez: Open, Howell Attack 1-0

Jan Smeets vs Magnus Carlsen
Amber Tournament (Rapid) Nice FRA round 4 2010.03.16
Ruy Lopez: Closed, Breyer 0-1

Jan Smejkal vs Jan Timman
IBM Amsterdam Amsterdam NED round 2 1973.07.18
Sicilian Defense: Accelerated Dragon, Maróczy Bind 1-0

Jan Timman vs Erik Gustaf Ferdinand Hellers
Sigeman and Co Malmo SWE round 7 1997.06.??
Grünfeld Defense: Exchange Variation, Classical Variation 0-1

Jan Timman vs Paul Backwinkel
Essen Handicap ,EXP Essen GER 1994.??.??
Slav Defense: Alekhine Variation 0-1

Jan Timman vs Vasily Smyslov
Interpolis 3rd Tilburg NED round 9 1979.11.12
Queen’s Gambit Declined: Ragozin Defense 1-0

Jan Werle vs Jonathan Levitt
Staunton Memorial Crowthorne ENG round 3 2006.08.16
Slav Defense: Alekhine Variation 1/2-1/2

Jan-Krzysztof Duda vs Hikaru Nakamura
Meltwater Tour Final 2021 chess24.com INT round 9.3 2021.10.04
English Opening: Four Knights System, Nimzowitsch Variation 0-1

Janos Balogh vs Karlis Alexander Ozols
non-FIDE Munich Olympiad Munich GER round 11 1936.08.23
French Defense: Winawer Variation, Advance Variation 1-0

Jarkko Penttinen vs Alexander Moiseenko
European Club Cup Kallithea GRE round 1 2008.10.17
French Defense: Diemer-Duhm Gambit 0-1