Law regarding name suffixes
<p><strong>Background:</strong> My parents were having a discussion of how name suffixes can be utilized if I started having children, how would name suffixes occur. This was all hypothetical.</p>

<p>My father, and let's call him, Bob, claims that if I (who has a different name from Bob) have a child named, "Bob", then I will be able to name my child Bob II (Bob, the second) or Bob Jr. He thinks that regardless of a generational gap between the child and father, his grandson is allowed to have a suffix for his own name that indicates a succeeding suffix for the name of Bob.</p>

<p>My mother claims that I would not be able to name my child Bob II or Bob Jr. because in order to have such suffix requires a continual generational naming convention. For instance, if my name was Bob, then I can name my child Bob II or Bob Jr. if and only if my name was Bob. Therefore, if my father's and child's name was Bob, it has to be Bob and only Bob without any suffixes.</p>

<p>I've tried looking for laws in the United States that says anything about suffixes for names but I haven't found anything.</p>

<p><strong>Question:</strong> Are there any laws in the United States or any of its states that restrict the usage of name suffixes, such as II, or Jr., or IV, etc.? Whose claim was correct about when it is legal to use name suffixes?</p>

<p>The law allows you to name your child whatever you want with some exceptions: names containing ideograms, pictograms, diacritical marks, obscenities or too long names are prohibited. That said, there is no law to forbid naming your child Bob Jr. (or even Bob Sr. or Bob The Great).</p>

<p>With numbers, things are a little bit tricky and vary from state to state, but using Roman suffixes is normally allowed, which means the law won't stop you naming your child Bob XVII or whatever:</p>

<blockquote>
  <p>No state prohibits the use of a numeral if it is spelled out. It would
  be permissible, for example, to name a child "Eight." But several
  states prohibit the use of a numerical symbol, which would prohibit
  naming a child "8." New Jersey, for example, permits the State
  Registrar to reject names that contain "numerals" or a "combination of
  letters, numerals, or symbols. In Illinois, administrative practice
  prohibits numerals when used as the first character in a child’s name.
  Texas prohibits numerals as part of the name or suffix, although Roman
  numerals may be used for suffixes. Thus, a child could be named "John
  William Turner III," but not "John William Turner 3" or "John William
  3 Turner."</p>
</blockquote>

<p>(from the <a href="http://www.gwlr.org/wp-content/uploads/2012/06/80-1-Larson.pdf" rel="noreferrer">paper by Carlton F.W. Larson</a>).</p>

united-states name natural-person