Essayist and analyst Jérôme Fourquet, who leads the Opinion and Corporate Strategies department at Ifop, explores the transformation of Breton names throughout the 20th century in his book Bretons. In this work, Fourquet examines how names in the Breton region of France have evolved over time, reflecting broader social, cultural, and political changes. Fourquet’s analysis considers the impact of historical events, such as the French Revolution and the rise of national identity, on naming practices. He highlights how traditional Breton names, often derived from Celtic roots, have interacted with and sometimes been replaced by more French-sounding names. This shift, according to Fourquet, illustrates the complex relationship between regional identity and national integration. The study also delves into the influence of modernization and migration on naming trends. As Breton communities became more connected to the rest of France and the world, names began to reflect these changing dynamics. Fourquet notes that while some families have preserved their ancestral names, others have adopted names that align with broader French or even international naming conventions. Through his research, Fourquet provides a nuanced understanding of how names serve as markers of identity and change. His work not only documents the evolution of Breton names but also invites readers to consider the broader implications of language and identity in a rapidly changing world.