In Ḥujran aʿnī ibna Umm Qaṭām, a person is first named and then clarified with aʿnī, “I mean.” Ibna is accusative, followed by a genitive construction identifying his mother. This is a genealogical identification, not a place-name.
Asadun fī al-liqāʾ functions as a figurative description: the warrior is not literally a lion. In fārisiyyatun khaḍrāʾ, noun and adjective are both feminine.
These details distinguish clarification of identity in one verse from metaphorical characterization in the next.