| JAN | the first month of the year |
|---|---|
| JAN | Czech educational reformer (1592-1670) |
| JAN | South African statesman and soldier (1870-1950) |
| JAN | Bohemian physiologist remembered for his discovery of Purkinje cells and the Purkinje network (1787-1869) |
| JAN | Dutch astronomer who proved that the galaxy is rotating and proposed the existence of the Oort cloud (1900-1992) |
| JAN | Czechoslovakian religious reformer who anticipated the Reformation |
| JAN | Dutch naturalist and microscopist who proposed a classification of insects and who was among the first to recognize cells in animals and was the first to see red blood cells (1637-1680) |
| JAN | Dutch economist noted for his work in econometrics (1903-1994) |
| JAN | Dutch painter renowned for his use of light (1632-1675) |
| JAN | Flemish painter who was a founder of the Flemish school of painting and who pioneered modern techniques of oil painting (1390-1441) |
| JAN | Dutch painter renowned for his use of light (1632-1675) |
| JAN | English novelist noted for her insightful portrayals of middle-class families (1775-1817) |