Some State Naming regulations
Arkansas: Apostrophes, hyphens, and spaces are allowed as long as they are not consecutive.

California: Derogatory or obscene names, pictographs and non-English characters are banned.

Florida: Parents need to sign an agreement to establish a child’s first name or else a court will select one.

Georgia: Symbols, including accents, are prohibited.

Illinois: No restrictions. Numbers and special characters are allowed.

Michigan: Only English characters allowed.

Mississippi: The child takes on the father’s surname automatically when parents are married. A different name can be requested if preferred.

New Jersey: Obscene names, numbers, and symbols are forbidden.

New York: First and middle names have a maximum length of 30 characters each, last names cannot exceed 40 characters. Numbers and symbols are forbidden.

North Carolina: Accent marks, hyphens, and tildes (ñ) are allowed.

Ohio: Hyphens, apostrophes, and spaces are allowed. Numbers are prohibited.

Texas: First, middle and last name cannot exceed 100 characters. Only English characters allowed. Numbers and diacritical marks are forbidden.

Virginia: Numbers, symbols and other special characters such as umlauts and tildes are banned.

examples of illegal names in the United States:

Jesus Christ.
Harry 3.
Hitler.
Nutella.
Ирина.
Nelly’s.
Chloé.
F!nn.
Aña.
@.