A man among us begot a boy whom he named Al-Qasim. The people said (to him), "We will not call you Abul-l-Qasim, nor will we please you by calling you so." The man came to the Prophet ﷺ and mentioned that to him. The Prophet ﷺ said to him, "Name your son ʿAbdur-Rahman." (Using translation from Bukhārī 6189)
سَمِعَ جَابِرًا ؓ يَقُولُ وُلِدَ لِرَجُلٍ مِنَّا غُلَامٌ فَسَمَّاهُ الْقَاسِمَ فَقُلْنَا لَا نُكَنِّيكَ أَبَا الْقَاسِمِ وَلَا نُنْعِمُ عَيْنًا فَأَتَيْنَا النَّبِيَّ ﷺ فَذُكِرَ ذَلِكَ لَهُ فَقَالَ سَمِّ ابْنَكَ عَبْدَ الرَّحْمَنِ أَخْرَجَاهُ فِي الصَّحِيحِ مِنْ حَدِيثِ ابْنِ عُيَيْنَةَ