All medalists.
IMO & IOI, including honourable mentions.
JGJavier Garcia De BringasSpainIMO1994Competition recordHonourable mentionJMJavier Múgica de RiveraSpainIMO1999Xunta de GaliciaTeacher of MathematicsIndexed profileJNJavier Nistal SalasSpainIMO2020Competition recordBronze medalJNJavier Nistal SalasSpainIOI2020Competition recordBronze medalJPJavier PenaColombiaIMO1984 · 1985Competition recordBronze medalJPJavier PerezEcuadorIMO2012 · 2013Competition recordHonourable mentionJPJavier Portella LemosSpainIMO1989Competition recordHonourable mentionJSJavier SánchezColombiaIMO1995Competition recordHonourable mention
Javier Sebastian TurekArgentinaIOI1999Earth Dynamics AIResearch ScientistAutumn profileJBJavlonbek BozorovUzbekistanIMO2006Competition recordBronze medalJIJavlon IsomurodovUzbekistanIMO2011HuaweiSenior Software EngineerIndexed profile
Jawad AkbarPakistanIOI2026SundarSTEM SchoolStudentAutumn profileJHJawad Hameem ChowdhuryBangladeshIMO2025 · 2026Competition recordBronze medalJMJayamuni Mario Shashindra Srimal SilvaSri LankaIMO2006Fairfirst Insurance LimitedAssistant General Manager Information TechnologyIndexed profileJCJay ChyungUnited States of AmericaIMO1995Competition recordBronze medalJHJayden Hoo Dun JieSingaporeIOI2026Competition recordBronze medalJJJayden JuriantoIndonesiaIMO2026Competition recordBronze medalJOJayden Osago MukisaUgandaIMO2026Competition recordHonourable mentionJPJayden PanAustraliaIMO2025 · 2026Competition recordGold medal · Silver medalIndexed profileJZJay ZhaoNew ZealandIMO2024 · 2025Competition recordSilver medalIndexed profileJCJazmin ChavarriPeruIMO2024Competition recordBronze medalJBJean Baptiste GouereFranceIMO1995Competition recordHonourable mentionJBJean Baptiste LeblondFranceIMO1974Sorbonne Universités, Université Pierre et Marie CurieProfesseur des UniversitésIndexed profileJBJean Benoit BostFranceIMO1978Competition recordBronze medal
Jean Christophe YoccozFranceIMO1973 · 1974Collège de FranceProfessor of Mathematics (statutory chair)Autumn profileJCJean Claude SikoravFranceIMO1974 · 1975ENS LyonProfesseurIndexed profileJAJeanette Alejandra Fernández RiveraEl SalvadorIMO2013Gymnase pour AdultesEnseignante de mathématiquesIndexed profileJBJean-François BertinFranceIMO1981 · 1982Competition recordGold medalJMJean-François MacqBelgiumIMO1996TRACTEBELAI EngineerIndexed profile
Jean-François MartinFranceIMO2008 · 2009 · 2010Competition recordSilver medalAutumn profileJGJean GarcinFranceIMO2009Sun'RIngénieur modélisation et algorithmesIndexed profileJLJean LorenziFranceIMO2001Competition recordBronze medalJLJean Louis SikoravFranceIMO1976Competition recordSilver medalJLJean Louis TuFranceIMO1989Competition recordBronze medalIndexed profileJDJean-Marc DaulFranceIMO1987Competition recordSilver medalJDJean-Marie DrozSwitzerlandIMO1999 · 2000Competition recordBronze medal · Silver medalJMJean Mari UriFranceIMO1969Competition recordSilver medal
Jean Michael WeightSouth AfricaIMO2020CubeSpace ADCSIndustrialisation Project EngineerAutumn profileJMJean-Paul MohsenFranceIMO1993University of LouisvilleProfessor and Associate DeanIndexed profileJSJeany Sergei MezaHondurasIMO2012Competition recordHonourable mention
Jeck LimSingaporeIMO2009 · 2010 · 2011 · 2012 · 2013University of OxfordPostdoctoral Research Associate in CombinatoricsAutumn profileJCJee Chul WooRepublic of KoreaIMO1997Competition recordGold medalJYJeehak YoonRepublic of KoreaIOI2014 · 2015Quora소프트웨어 엔지니어Indexed profileJHJee Hoon KangRepublic of KoreaIOI2005FuriosaAIChief Research OfficerIndexed profile
Jeet MohapatraIndiaIMO2014 · 2015Massachusetts Institute of TechnologyGraduate Research AssistantAutumn profileJCJeffrey Chin How PangSingaporeIMO1996DSTAEngineerIndexed profileJCJeffrey Chun Hean LeeSingaporeIOI2018 · 2019Competition recordSilver medalJGJeffrey GrossmanCanadaIMO1990 · 1991 · 1992ZeroKey Inc.Indexed profileJHJeffrey HighamCanadaIMO1989J.Higham ConsultantsChief Executive OfficerIndexed profileJKJeffrey KwanUnited States of AmericaIMO2020Competition recordSilver medalJMJeffrey M. VanderkamUnited States of AmericaIMO1989 · 1990Competition recordSilver medal · Gold medalJSJeffrey SaxBelgiumIMO1988 · 1989Numerics.NETFounder and PresidentIndexed profileJXJeffrey XiaoCanadaIOI2016Competition recordBronze medalAutumn profileJYJeff York YeHong KongIMO2017Competition recordBronze medalJLJef LagaBelgiumIMO2014Competition recordHonourable mention
Jeha YangRepublic of KoreaIMO2006 · 2007Two SigmaVice PresidentAutumn profileJPJekaterina ProstakovaEstoniaIMO2004Competition recordHonourable mentionJIJelena IvančićSerbiaIMO2017 · 2018 · 2019Competition recordBronze medal · Silver medal · Gold medalJMJelena MilanovićYugoslavia, Serbia and MontenegroIMO2002 · 2003ArmLead Architect, Arm A-profile Instruction setIndexed profileJRJelena RadovićBosnia and HerzegovinaIMO2006 · 2008 · 2009Competition recordHonourable mention · Bronze medal
Javier Sebastian TurekArgentinaIOI1999Earth Dynamics AIResearch ScientistAutumn profileJBJavlonbek BozorovUzbekistanIMO2006Competition recordBronze medalJIJavlon IsomurodovUzbekistanIMO2011HuaweiSenior Software EngineerIndexed profileJawad AkbarPakistanIOI2026SundarSTEM SchoolStudentAutumn profileJHJawad Hameem ChowdhuryBangladeshIMO2025 · 2026Competition recordBronze medalJMJayamuni Mario Shashindra Srimal SilvaSri LankaIMO2006Fairfirst Insurance LimitedAssistant General Manager Information TechnologyIndexed profileJCJay ChyungUnited States of AmericaIMO1995Competition recordBronze medalJHJayden Hoo Dun JieSingaporeIOI2026Competition recordBronze medalJJJayden JuriantoIndonesiaIMO2026Competition recordBronze medalJOJayden Osago MukisaUgandaIMO2026Competition recordHonourable mentionJPJayden PanAustraliaIMO2025 · 2026Competition recordGold medal · Silver medalIndexed profileJZJay ZhaoNew ZealandIMO2024 · 2025Competition recordSilver medalIndexed profileJCJazmin ChavarriPeruIMO2024Competition recordBronze medalJBJean Baptiste GouereFranceIMO1995Competition recordHonourable mentionJBJean Baptiste LeblondFranceIMO1974Sorbonne Universités, Université Pierre et Marie CurieProfesseur des UniversitésIndexed profileJBJean Benoit BostFranceIMO1978Competition recordBronze medalJean Christophe YoccozFranceIMO1973 · 1974Collège de FranceProfessor of Mathematics (statutory chair)Autumn profileJCJean Claude SikoravFranceIMO1974 · 1975ENS LyonProfesseurIndexed profileJAJeanette Alejandra Fernández RiveraEl SalvadorIMO2013Gymnase pour AdultesEnseignante de mathématiquesIndexed profileJBJean-François BertinFranceIMO1981 · 1982Competition recordGold medalJMJean-François MacqBelgiumIMO1996TRACTEBELAI EngineerIndexed profileJean-François MartinFranceIMO2008 · 2009 · 2010Competition recordSilver medalAutumn profileJGJean GarcinFranceIMO2009Sun'RIngénieur modélisation et algorithmesIndexed profileJLJean LorenziFranceIMO2001Competition recordBronze medalJLJean Louis SikoravFranceIMO1976Competition recordSilver medalJLJean Louis TuFranceIMO1989Competition recordBronze medalIndexed profileJDJean-Marc DaulFranceIMO1987Competition recordSilver medalJDJean-Marie DrozSwitzerlandIMO1999 · 2000Competition recordBronze medal · Silver medalJMJean Mari UriFranceIMO1969Competition recordSilver medalJean Michael WeightSouth AfricaIMO2020CubeSpace ADCSIndustrialisation Project EngineerAutumn profileJMJean-Paul MohsenFranceIMO1993University of LouisvilleProfessor and Associate DeanIndexed profileJSJeany Sergei MezaHondurasIMO2012Competition recordHonourable mentionJeck LimSingaporeIMO2009 · 2010 · 2011 · 2012 · 2013University of OxfordPostdoctoral Research Associate in CombinatoricsAutumn profileJCJee Chul WooRepublic of KoreaIMO1997Competition recordGold medalJYJeehak YoonRepublic of KoreaIOI2014 · 2015Quora소프트웨어 엔지니어Indexed profileJHJee Hoon KangRepublic of KoreaIOI2005FuriosaAIChief Research OfficerIndexed profileJeet MohapatraIndiaIMO2014 · 2015Massachusetts Institute of TechnologyGraduate Research AssistantAutumn profileJCJeffrey Chin How PangSingaporeIMO1996DSTAEngineerIndexed profileJCJeffrey Chun Hean LeeSingaporeIOI2018 · 2019Competition recordSilver medalJGJeffrey GrossmanCanadaIMO1990 · 1991 · 1992ZeroKey Inc.Indexed profileJHJeffrey HighamCanadaIMO1989J.Higham ConsultantsChief Executive OfficerIndexed profileJKJeffrey KwanUnited States of AmericaIMO2020Competition recordSilver medalJMJeffrey M. VanderkamUnited States of AmericaIMO1989 · 1990Competition recordSilver medal · Gold medalJSJeffrey SaxBelgiumIMO1988 · 1989Numerics.NETFounder and PresidentIndexed profileJXJeffrey XiaoCanadaIOI2016Competition recordBronze medalAutumn profileJYJeff York YeHong KongIMO2017Competition recordBronze medalJLJef LagaBelgiumIMO2014Competition recordHonourable mentionJeha YangRepublic of KoreaIMO2006 · 2007Two SigmaVice PresidentAutumn profileJPJekaterina ProstakovaEstoniaIMO2004Competition recordHonourable mentionJIJelena IvančićSerbiaIMO2017 · 2018 · 2019Competition recordBronze medal · Silver medal · Gold medalJMJelena MilanovićYugoslavia, Serbia and MontenegroIMO2002 · 2003ArmLead Architect, Arm A-profile Instruction setIndexed profileJRJelena RadovićBosnia and HerzegovinaIMO2006 · 2008 · 2009Competition recordHonourable mention · Bronze medal