إِبْرَاهِيمُ is a proper name of foreign origin. It may combine ʿalamiyya with ʿujma.
مَرَرْتُ بِإِبْرَاهِيمَ — I passed by a person named Ibrāhīm.
إِبْرَاهِيمَ: genitive after bi-, with fatḥa because of diptote status.
The detailed conditions of foreign-origin names belong to the next source passage; this is only a preview of the combination.