- Rousseau, Jean-Jacques, 1712-1778 (8)
- Barker, Ernest, Sir, 1874-1960 (2)
- Cole, G. D. H. (George Douglas Howard), 1889-1959 (2)
- Hume, David, 1711-1776 (2)
- Locke, John, 1632-1704 (2)
- Claydon, Leslie F. (1)
- Descartes, René, 1596-1650 (1)
- Hobbes, Thomas, 1588-1679 (1)
- Hutchins, Robert Maynard, 1899-1977 (1)
- Montesquieu, Charles de Secondat, baron de, 1689-1755 (1)
- Nugent, Thomas, 1700?-1772 (1)
- Prichard, J. V. (Joseph Vila) (1)
- Voltaire, 1694-1778 (1)
- Waring, William W., 1923- (1)