Maʿrifat asmāʾ al-mukannayn
Recovering the given names of narrators best known by their kunyas.
This is the reverse of the preceding case. Some transmitters are famous under Abū followed by a name, whereas a less familiar chain gives their personal name. Reliable biographical cross-identification is needed to connect the two forms.
An isolated designation such as “Abū ʿAbd Allāh” is not uniquely identifying: many transmitters bear it. The narrator's teacher, pupil, and historical period must be compared before assigning a particular identity.