The work examines the toponymy of the historic Bourbonnais region, tracing the origins and evolution of place names through linguistic analysis together with dialectal variation and historical documentation. Drawing on extensive fieldwork and archival research, Marcel Bonin presents a detailed inventory of geographical names, explaining their etymological roots in Old French, Occitan, together with earlier Celtic or Germanic influences. The study also considers how social and political changes as well as environmental shifts have shaped naming practices over centuries. By situating local names within broader patterns of French linguistic development, the volume serves as both a reference for scholars of toponymy and a resource for regional historians. Its clear organization and scholarly rigor make it valuable for anyone interested in the interplay between language, landscape, and identity in central France.