| Main index | Contents of Onomastikon |
| Western Europe index | Other western European names |
| History | A short historical background |
| Names | Naming practices |
| Flemish/Germanic | Names of Germanic origin |
| Biblical | Names of Biblical origin |
| Latin | Names of Latin origin |
| Greek | Names of Greek origin |
| Celtic | Names of Celtic origin |
| Surnames | Flemish surnames |
| Walloon | Names of French/Walloon origin |
| Rulers | Counts of Flanders, Kings of Belgium |