What is "shumshevashi"

Shumshevashi is the name of several rural localities in the Chuvash Republic, Russia:

• Shumshevashi, Alikovsky District, Chuvash Republic, a selo in Shumshevashskoye Rural Settlement of Alikovsky District
• Shumshevashi, Krasnochetaysky District, Chuvash Republic, a village in Bolsheatmenskoye Rural Settlement of Krasnochetaysky District