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