Jean-Jacques Dwelshauvers, who went by the name of Jacques Mesnil (9 July 1872, Brussels - 14 November 1940, Montmaur-en-Diois) was a journalist, art critic, art historian and anarchist.
Many of the sites where offerings to Borvo have been found are in Gaul: inscriptions to him have been found in Drôme at Aix-en-Diois, Bouches-du-Rhône at Aix-en-Provence, Gers at Auch, Allier at Bourbon-l'Archambault, Savoie at Aix-les-Bains, Saône-et-Loire at Bourbon-Lancy, in Savoie at Aix-les-Bains, Haute-Marne at Bourbonne-les-Bains and in Nièvre at Entrains-sur-Nohain.