A manual for writers of research papers, theses, and dissertations, 7th edition - Kate L. Turabian 2007
Names with numbers
Numbers
Part III. Style 20 spelling
Some types of personal, governmental, and organizational names include numbers given in either words or numerals. See also 22.1 for capitalization of proper names generally.
Leaders. Emperors, sovereigns, or popes with the same first name are differentiated by capitalized roman numerals (see table 23.1).
Charles V
Napoleon III
Elizabeth II
Benedict XVI
Family members. Male family members with identical full names are often differentiated with roman or arabic numerals (see also 24.2.1). Note that there are no commas between the name and the numeral.
Adlai E. Stevenson III
Michael F. Johnson 2nd
Governments and political divisions. Certain dynasties, governments, governing bodies, political and judicial divisions, and military units are commonly designated by an ordinal number before the noun. Spell out and capitalize numbers through one hundred (with a hyphen between the parts of the number, if relevant); use numerals for those over one hundred.
Nineteenth Dynasty
Fourteenth Congressional District
Fifth Republic
Forty-seventh Ward
Eighty-first Congress
Tenth Circuit
109th Congress
101st Airborne Division
Churches and religious organizations. Spell out and capitalize numbers before the names of churches or religious organizations in ordinal form (with a hyphen between the parts of the number, if relevant).
Twenty-first Church of Christ, Scientist
Secular organizations. Express local branches of fraternal lodges and unions in numerals following the name.
American Legion, Department of Illinois, Crispus Attucks Post no. 1268
United Auto Workers, Local 890