The story
- Proto-Indo-European*lewk-
- Proto-Indo-European*lówkos
- Proto-Germanic*lauhaz
- Proto-West Germanic*lauh
- Old Dutch*lo
- Proto-Indo-European*ḱweyn-
- Proto-Germanic*hwainō
- Old Dutch*hvein
- Old Dutch*Loven
- Medieval LatinLovanium
- FrenchLouvain
- English todayLouvain
Borrowed from French Louvain.
Etymology from Wiktionary, CC BY-SA 4.0.