Short answer. Yes. Article 379 of the Civil Code expressly provides that pen names and stage names cannot be usurped. The law permits their use, subject to good faith and no injury to third persons, and protects against another person appropriating the name you have legitimately established.
What the law says
Pen names and stage names cannot be usurped.
Civil Code, Article 379 — Pen Names and Stage Names. Read the full provision →
The right to use a pen or stage name — and to protect it
Article 379 of the Civil Code does two things in two sentences. The first sentence permits the use of pen names and stage names, provided the use is in good faith and causes no injury to third persons. The second sentence extends the protection: these names, once legitimately in use, cannot be usurped by another person. Together, the article creates a right that attaches to the person who first uses the name in good faith — a right that others must respect.
What good faith requires
The good-faith condition means you cannot adopt a pen or stage name in order to deceive the public or mislead people into confusing you with a well-known existing artist or writer. A stage name chosen specifically to profit from the reputation of another performer fails the good-faith requirement. Similarly, adopting a name that injures a third person — for instance, by implying a false association with a real individual or established brand — is not protected. Good faith is both a condition for validly using the name and the foundation for the legal protection that follows.
What usurpation means in practice
Usurpation means another person appropriates your pen or stage name and uses it as their own — in a way that passes them off as you, or that trades on the identity you have built under that name. If you have written under a particular name for years, built a readership, and another writer begins publishing under the same name, that is the kind of conduct Article 379 forbids. The key is that the name must be yours in the sense that you have legitimately established it through actual use in good faith. A name you registered but never used publicly may have a weaker claim than a name actively in use over time.
The limits of Article 379 and other protections that may apply
Article 379 provides a civil-law foundation for pen and stage name protection. It does not give you a registered trademark or copyright over the name — those protections follow different laws and procedures. If you have been consistently using a name in commerce or publishing, you may also have overlapping rights under intellectual property law. Article 379 operates as a baseline: the name cannot be usurped, and using it injuriously violates the Civil Code. For stronger or more specific protection — especially if you are a performer or writer building a commercial brand — intellectual property registration under the relevant statutes adds an additional and more enforceable layer of security.