| Author | Titles | | 1.
| Xylon (Áustria) | 1 | | 2.
| XYZ (Grupo de artistas) | 1 | | 3.
| Y Grego ( Lisboa, Portugal ) | 2 | | 4.
| Y. Nakahara | 1 | | 5.
| Y (nome de artista) | 0 | | 6.
| Author is: Penck, A. R. (nome de artista) | 10 | | 7.
| Y., pseud. | 0 | | 8.
| Author is: Viana, Abel, 1896-1964 | 117 | | 9.
| Y. Tono | 1 | | 10.
| Yaben, Hilario | 1 | | 11.
| Yabkevitch, Guennady | 1 | | 12.
| Yachar Kemal, pseud. | 0 | | 13.
| Author is: Kemal, Yasar, 1922-2015 | 1 |
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