| EPICURUS | Greek philosopher born in 341 BC who authored treatise On Nature |
| PYTHAGORAS | Greek philosopher born on Samos c570 BC (10) |
| ARISTOTLE | Greek philosopher born 384 BC, tutor to Alexander the Great (9) |
| DIOGENES | Greek Cynic philosopher born in Sinope who advocated self-sufficiency |
| PARMENIDES | Greek philosopher of Elea whose doctrines are explained in the poem On Nature (10) |
| CONFUCIUS | Ancient Chinese philosopher born in 551 BC (9) |
| LOCKE | English philosopher born in Wrington, Somerset in 1632 (5) |
| DIDEROT | Denis, French philosopher born in 1713 who served as chief editor of the Encyclopedie (7) |
| KARLPOPPER | Philosopher born in Vienna in 1902 last to talk with unusually proper pal (4,6) |
| BARUCH | ****** Spinoza, philosopher born in Amsterdam in 1632 (6) |
| HUME | Enlightenment philosopher born in Edinburgh in 1711 |
| NACHMANIDES | Medieval Jewish scholar and philosopher born in Girona in 1194 (11) |
| BRONOWSKI | Jacob ___, mathematician and philosopher born in Poland in 1908 (9) |
| RAND | Ayn ___, Russian-born writer and philosopher born in 1905 (4) |
| CARLYLE | Thomas ___, Scottish philosopher born in 1795 who founded the London Library (7) |
| XENOPHON | Greek military leader, historian and philosopher born in 431BC (8) |
| JEANPAULSARTRE | Existentialist philosopher born in Paris in 1905 (4-4,6) |
| WITTGENSTEIN | Ludwig --, philosopher born in Vienna (1889-1951) (12) |
| PLOTINUS | Roman philosopher, born in Egypt c. 205 AD, regarded as the founder of Neoplatonism (8) |
| KRISHNAMURTI | Spiritual writer-philosopher born in British India |
