Alsa

Possibly related to the river name Alsium; both could be from an extended form of Proto-Indo-European *h₂el- (“to nourish, grow”).

View of the river

• (Classical) IPA^(key): /ˈal.sa/, [ˈäɫ̪s̠ä]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈal.sa/, [ˈälsä]

Alsa f sg (genitive Alsae); first declension

1. A river of Venetia that flows into the Adriatic Sea, now Ausa

First-declension noun, singular only.

• Italian: Ausa

• “Alsa”, in William Smith, editor (1854, 1857), A Dictionary of Greek and Roman Geography, volume 1 & 2, London: Walton and Maberly
• Alsa in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
• DNGI: Dizionario dei nomi geografici italiani, TEA, Torino 1992.