Dutch word aan comes from Proto-Indo-European *h₂en- (On, onto.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *h₂en- | Proto-Indo-European (ine-pro) | On, onto. |
| *ana | Proto-Germanic (gem-pro) | |
| *h₂enh̥₂ | Proto-Germanic (gem-pro) | |
| *an | Proto-Germanic (gem-pro) | On, onto (+accusative) onto. (+dative) on, upon. |
| ana | Old Dutch (odt) | |
| āne | Middle Dutch (dum) | |
| aan | Dutch (nld) | (slang, said of parties) amazing, lit. On (functional, operational) On On. To. |