الْبَكْرِيِّ: the Bakrite, genitive by the preceding construct relation.
بِشْرٍ: the person’s name, a genitive explanatory apposition.
The بِ of «بِشْرٍ» is part of the name, not a preposition. The first noun is genitive through iḍāfah; the second follows its case as an apposition.
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ʿAṭf al-Bayān: Definition, Examples, and Contrast with Badal
الْبَكْرِيِّ: the Bakrite, genitive by the preceding construct relation.
بِشْرٍ: the person’s name, a genitive explanatory apposition.
The بِ of «بِشْرٍ» is part of the name, not a preposition. The first noun is genitive through iḍāfah; the second follows its case as an apposition.