Dutch word belang comes from Proto-Germanic *langaz (Long.), Proto-Indo-European *lengʷʰ-
| Dictionary entry | Language | Definition |
|---|---|---|
| *langaz | Proto-Germanic (gem-pro) | Long. |
| *lengʷʰ- | Proto-Indo-European (ine-pro) | not heavy, agile, nimble |
| *langijaną | Proto-Germanic (gem-pro) | To lengthen, make long. |
| *langōną | Proto-Germanic (gem-pro) | To desire; long for. |
| *langon | Old Dutch (odt) | |
| belangen | Middle Dutch (dum) | |
| belanc | Middle Dutch (dum) | |
| belang | Dutch (nld) | Importance, significance. Interest, concern. |