Philosopher Quotes
- William A. Dembski 1960 -
- William Ames 1576 - 1633
- William Barrett 1913 - 1992
- William Ernest Hocking 1873 - 1966
- William Gilbert 1544 - 1603
- William Godwin 1756 - 1836
- William H. Gass 1924 - 2017
- William Hazlitt 1778 - 1830
- William Irwin Thompson 1938 - 2020
- William James 1842 - 1910
- William Kingdon Clifford 1845 - 1879
- William Lane Craig 1949 -
- William Martin 1772 - 1851
- William of Conches 1090 - 1154
- William of Occam 1287 - 1347
- William P. Leahy 1948 -
- William Paley 1743 - 1805
- William Pepperell Montague 1873 - 1953
- William Petty 1623 - 1687
- William Thompson 1775 - 1833
- William Torrey Harris 1835 - 1909
- William Whewell 1794 - 1866
- William Winwood Reade 1838 - 1875
- Wolfgang Smith 1930 -
- Xenocrates 396 - 314
- Xenophanes 570 - 475
- Xenophon 430 - 354
- Xun Kuang 313 - 238
- Xunzi 310 - 235
- Yamaga Soko 1622 - 1685
- Yamamoto Tsunetomo 1659 - 1719
- Yasuhiko Kimura 1954 -
- Zechariah Chafee 1885 - 1957
- Zengzi 505 - 435
- Zeno of Citium 334 - 262
- Zeno of Elea 495 - 430
- Zeno Vendler 1921 - 2004
- Zhang Zai 1020 - 1077
- Zhuangzi 369 - 286
- Zicheng Hong 1572 - 1620