/vjɛn/
Vienna (the capital and largest city of Austria)
Of disputed origin. Perhaps from the Roman name, Latin Vindobona, or possibly from a Celtic word *Veduna (“forest stream”), which would justify the phonetic evolution into the modern french form. Compare Proto-Celtic *widus (“woodland”).
Vienne (a town and commune of Isère department, Auvergne-Rhône-Alpes, France)
From Classical Latin Vienna, further etymology uncertain.
Vienne (a left tributary of the Loire in southwest France, flowing through the departments of Corrèze, Creuse, Haute-Vienne, Charente, Vienne and Indre-et-Loire); Vienne (a department of Nouvelle-Aquitaine, France)
Related: Haute-Vienne
Possibly from *vig-, with a pre-Celtic suffix -ara (see Vienne (affluent de la Loire)#Étymologie on French Wikipedia). The department was named after the river.