1. (

• Calvin ,
• Melvin_Calvin

) United States chemist noted for discovering the series of chemical reactions in photosynthesis (1911-) ;

2. (

• Calvin ,
• John_Calvin ,
• Jean_Cauvin ,
• Jean_Caulvin ,
• Jean_Chauvin

) Swiss theologian (born in France) whose tenets (predestination and the irresistibility of grace and justification by faith) defined Presbyterianism (1509-1564) ;