Do You Italicize Nicknames?

Do You Italicize Nicknames? Do you italicize nicknames? Thus, when the nickname is used as part of the full name, we enclose the nickname in quotation marks: Frederico “Fredo” Corleone. But when the nickname is used alone, quotation marks are omitted. Should a nickname be in quotations? Quoting The Associated Press (AP): “When a nickname