Noun
prosopography (countable and uncountable, plural prosopographies)
a study of the individuals in a group of people within a specific context and their relationships
A prosopography that includes Gregory's ten cardinals and their familiae or official households, both clerical and lay. Source: Internet
Note, however, that this prosopography is not universally accepted by other scholars, who argue that Hadrian's mother was known, according to Historia Augusta, as Domitia Paulina. Source: Internet