| Author | Titles | | 1.
| Xavier, Raúl, 1894-1964 | 16 | | 2.
| Xavier, Raúl Maria, 1894-1964 | 0 | | 3.
| Author is: Xavier, Raúl, 1894-1964 | 16 | | 4.
| Xavier, Rui, 1964- | 4 | | 5.
| Xavier, Rui, 1974- | 5 | | 6.
| Xavier, Rui Filipe Teixeira, 1964 | 0 | | 7.
| Author is: Xavier, Rui, 1964- | 4 | | 8.
| Xavier, Sandra Isable de Oliveira, 1971- | 1 | | 9.
| Xavier, Thiago | 1 | | 10.
| Xavier, Tito | 1 | | 11.
| Xavier, Vítor Boura | 1 | | 12.
| Xavira, António | 1 |
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