| Main index | Contents of Onomastikon |
| Western Europe index | Other western European names |
| History | A short historical background |
| Rulers | Emirs, Caliphs of Cordova, Navarre, Burgos/Castile, Habsburgs, Bourbons |
| Biblical | Names of Biblical origin |
| Latin | Names of Latin origin |
| Greek | Names of Greek origin |
| Germanic | Names of Germanic origin |
| Various | Names from various sources |
| Surnames | Spanish surnames |
| Catalonia | Male, Female |
| Aragon | Male, Female, Rulers |
| Asturias | Male, Female |
| Galicia | Male, Female |