Saint-Onen-la-ChapelleSaint-Onen-la-Chapelle is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.WWW st.onen.la.chapelle.free....FB Saint-Onen-la-Chapelle-10...PopulationInhabitants of Saint-Onen-la-Chapelle are called onenais in French.