A personal name is either a Polynym (a name with multiple sortable components), a Mononym (a name with only one component), or a Pictonym (a name represented by a picture - this exists due to people like [Prince][1]). A person can have multiple names, playing roles, such as LEGAL, MARITAL, MAIDEN, PREFERRED, SOBRIQUET, PSEUDONYM, etc. You might have business rules, such as "a person can only have one legal name at a…
You can very easily have multiple legal names, as "legal" is a national concept and you can have multiple citizenships, each one with a different legal system and thus potentially a different legal name.
Looks like GP didn't read the list.