Concise AACR2: 35. Entry under title or nobility

35A. Definition

A person of modern times identified by a title of nobility has a name that consists of:

forename(s)–for example: Anne; George Gordon

Surname– for example: Finch; Byron

title– for example: Countess of Winchilsea; Baron Byron

Consider those persons who either use their titles rather than their surnames in manifestations of their works or are listed under their titles in reference sources² to be commonly identified by their titles.

35B. General rule

If a person is commonly identified by a title, enter under the proper name in his or her title of nobility. Follow the proper name by the person's fornames(s) and surname (in that order) and by the term of rank³ in the person's language.

Enter a person with a title who is not commonly identified by his or her title under surname (see rule 34 and 40) or given name (see rules 36 and 40) as appropriate.

35C.

If a person acquires a title of nobility, gives up such a title, or acquires a new title of nobility, follow the instructions in rule 32B in choosing the name to be used as the basis for the heading.

2. Disregard reference sources that list members of the nobility either all under title or all under surname.

3. The terms of rank in the United Kingdom peerage are Duke, Duchess, Marquess (Marquis), Marchioness, Earl, Countess, Viscount, Viscountess, Baron, and Baroness.