| Verfasser | Häufigkeit |
| Nicolau Castro, Juan |
56 |
| Castro, Juan Blas de 1560-1634 |
19 |
| Castro, Juan E. de 1959- |
13 |
| Castro, Juan J. |
9 |
| Birns, Nicholas 1965- |
5 |
| Castro, Juan B. de |
5 |
| Castro, Juan E. De |
4 |
| Castro, Juan F. de |
4 |
| Castro, Juan de |
4 |
| Alvarez, Aureliano |
3 |
| Castro, Juan José 1895-1968 |
3 |
| Castro, Juan R. |
3 |
| Alberca de Castro, Juan Antonio |
2 |
| Castillo, Oscar 1959- |
2 |
| Castro Velázquez, Juan 1947- |
2 |
| Castro y Calvo, José María 1903-1987 |
2 |
| Castro, Juan A. de |
2 |
| Castro, Juan Carlos |
2 |
| Castro, Juan Cristóbal |
2 |
| Castro, Juan José |
2 |