| Autor | Títulos | | 1.
| Williams, Hugo | 1 | | 2.
| Williams, Iolo Aneurin | 2 | | 3.
| Williams, Iwan | 1 | | 4.
| Williams, Jane Curtis | 1 | | 5.
| Williams, Jay | 1 | | 6.
| Williams, Jo | 0 | | 7.
| Ver: Williams, Joanna | 1 | | 8.
| Williams, Joanna | 1 | | 9.
| Williams, John | 2 | | 10.
| Williams, John, 1928- | 3 | | 11.
| Williams, Jonathan | 2 |
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