There is no official list of illegal names in Texas. What exists instead is a legal standard for court-ordered name changes and a set of technical limits in the state’s registration systems. Together they decide what you can actually put on a birth certificate, driver’s license, or name change order. Judges reject names that fail the “interest of the public” test under Texas Family Code Section 45.103,1State of Texas. Texas Family Code Section 45.103 – Order and the state’s databases quietly block numerals, symbols, and anything too long to fit in a fixed field.
The Public Interest Test
Every adult name change in Texas has to clear the same bar: the court must find the new name is both in your interest and in the interest of the public.1State of Texas. Texas Family Code Section 45.103 – Order That second half is where petitions get denied. No statute spells out which names qualify, so judges have broad discretion.
In practice, names likely to fail the test include anything obscene, racially inflammatory, or deceptive. A name that impersonates a public official, suggests a professional credential you don’t hold, or is clearly chosen to shake off debts or a criminal record will usually get turned down. If the requested name would confuse the public, defraud someone, or exists only to provoke, expect a denial.
Numerals and Symbols
The Texas Vital Statistics Section, part of the Department of State Health Services, runs the electronic registration system that produces birth certificates.2Texas Department of State Health Services. Vital Statistics That system accepts standard English alphabetical characters. Arabic numerals (1, 2, 3) and symbols like @, #, or $ are not characters the software can store in a name field. The block is practical rather than statutory, but the effect is the same: those characters cannot appear in a legal name.
Roman numeral suffixes such as III or IV come through fine because the system reads them as letters. If you want “the Third” after a name, spelling it out or using the Roman letters will work; the digit 3 will not.
Accents, Tildes, and Other Diacritical Marks
For years, Texas birth certificates stripped out tildes, accents, umlauts, and cedillas because the state’s software couldn’t handle them. House Bill 1823 changed that by adding Section 191.009 to the Health and Safety Code.3Texas Legislature Online. Bill Analysis HB 1823 85R The state registrar is now required to record diacritical marks on vital statistics records.4Texas Public Law. Texas Health and Safety Code Section 191.009 – Use of Diacritical Marks
The statute defines diacritical marks as marks used in Latin script to change a letter’s sound or distinguish word meaning, and specifically lists accents, tildes, graves, umlauts, and cedillas.4Texas Public Law. Texas Health and Safety Code Section 191.009 – Use of Diacritical Marks A companion provision in the Transportation Code applies the same rule to driver’s licenses and state ID cards.3Texas Legislature Online. Bill Analysis HB 1823 85R The TxEVER birth registration system gives registrars keyboard shortcuts to enter the marks.5Texas Department of State Health Services. Birth Registrar TxEVER Cheat Sheet
The practical ceiling is still software compatibility. The common marks used in Spanish, German, French, and Portuguese names are supported. A mark outside what the system recognizes may not print correctly even now.
How Long a Name Can Be
Birth certificates and driver’s licenses in Texas use fixed-size fields. No statute caps the number of characters in a legal name, but anything longer than a field can hold gets truncated on the printed document.
That matters beyond appearance. A truncated name on a driver’s license that doesn’t match your birth certificate or Social Security card can cause problems during background checks, employment verification, and travel. Keeping a chosen or changed name within a reasonable length prevents those mismatches.
Criminal History Restrictions
Name change petitions get extra scrutiny when the petitioner has a criminal record. Every petition must disclose felony convictions, sex offender registration status, and any charge above a Class C misdemeanor. Petitioners also submit a complete set of fingerprints.6State of Texas. Texas Family Code FAM Section 45.102 – Requirements of Petition
If you have a final felony conviction, you cannot petition for a name change until at least two years after you finish your sentence, probation, or community supervision. The exceptions are narrow: you’ve been pardoned, or you’re asking to change your name back to the primary name already in your criminal history records.1State of Texas. Texas Family Code Section 45.103 – Order
Registered sex offenders have to prove to the court that they have notified the appropriate local law enforcement authority of the proposed change before the court will even consider it.1State of Texas. Texas Family Code Section 45.103 – Order Notification alone isn’t enough; the petition still has to pass the public interest test.
Naming a Child
The rules above apply to adult name changes through the courts. Parents naming a newborn don’t appear before a judge, so the public interest test doesn’t gatekeep what goes on a Texas birth certificate at birth. What limits the choice is the registration system itself: no digits, no symbols, supported diacritical marks only, and nothing longer than the field allows. A court-ordered change to a minor’s name later on is judged by the child’s best interest, and children 10 and older must consent to the change in writing.