CORBU not really exist in French, unless it was shorten from SCORBUT, and I don't think that your cat obtained its name from a disease that certain old colonists caught at the time their voyage in boat from the old country, to the new world...
Claude, thank you for your kind comments. Glacier got her name because of the whiteness of ice glaciers. I didn't know that Glacier was French, but how interesting, because Corbu is a French word also. I don't know what Corbu means or why she was named that, but I love her name.