| Author | Titles | | 1.
| Ruwière, Jeanne de la | 1 | | 2.
| Ruy, 1907-1935 | 0 | | 3.
| Author is: Gameiro, Rui Roque, 1907-1935 | 13 | | 4.
| Ruy, 1949-1976 | 0 | | 5.
| Author is: Leitão, Ruy, 1949-1976 | 9 | | 6.
| Ruy Amado (Lisboa, Portugal) | 1 | | 7.
| Ruy Athouguia, 1917-2006 | 0 | | 8.
| Author is: Atouguia, Rui, 1917-2006 | 25 | | 9.
| Ruy d'Athouguia, 1917-2006 | 0 | | 10.
| Author is: Atouguia, Rui, 1917-2006 | 25 | | 11.
| Ruy de Athouguia, 1917-2006 | 0 | | 12.
| Author is: Atouguia, Rui, 1917-2006 | 25 | | 13.
| Ruy, José, 1930-2022 | 3 | | 14.
| Ruy Leitão, 1949-1976 | 0 | | 15.
| Author is: Leitão, Ruy, 1949-1976 | 9 | | 16.
| Ruyen, Jean-Sébastien | 1 |
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