I am writing a handbook of information of persons of note. While most of it is straight forward and standardised content that all persons share, for example date of birth, periods of service and the like. Most of this content would be limited to a page.
However, I would like to include an unstructured section for information that is specific to that person and may not be shared. For example, important dates or notable events, relations to other persons and so on.
In the general context this is "trivia" but this implies an informal note, and people may be tempted to fill it with information not appropriate for the book. Spouses names, hometowns and so on.
What is a formal term for "trivia" that most people would understand?