Why did Rene Robert cavalier changed his last name?

René Robert Cavelier, Sieur de La Salle, changed his last name to "La Salle" to reflect his title and land ownership, as "La Salle" means "the hall" in French, indicating a noble or significant estate. This change was part of his efforts to establish himself as a prominent explorer and landowner in the New World during the 17th century. It helped solidify his identity and legacy in the context of his expeditions and interactions with Indigenous peoples.