A child was born in the house of a person amongst us, and he gave him the name of Qasim. We said: We will not allow you (to give the name) to your child as Qasim (and thus adopt the kunya of Abu'l-Qasim) and coal your eyes. He (that person) came to Allah's Apostle ﷺ and made a mention of that to him, whereupon he said: Call your son 'Abd al-Rahman.
أَنَّهُ سَمِعَ جَابِرَ بْنَ عَبْدِ اللَّهِ يَقُولُ وُلِدَ لِرَجُلٍ مِنَّا غُلاَمٌ فَسَمَّاهُ الْقَاسِمَ فَقُلْنَا لاَ نَكْنِيكَ أَبَا الْقَاسِمِ وَلاَ نُنْعِمُكَ عَيْنًا فَأَتَى النَّبِيَّ ﷺ فَذَكَرَ ذَلِكَ لَهُ فَقَالَ أَسْمِ ابْنَكَ عَبْدَ الرَّحْمَنِ