Jabir said, "One of our men had a son and named him al-Qasim. The Ansar said, "We will not give you the kunya of Abu'l-Qasim to make you happy.' He went to the Prophet, may Allah bless him and grant him peace, and told him what the Ansar had said. The Prophet, may Allah bless him and grant him peace, said, 'The Ansar did well. Call yourselves with my name but do not use my kunya. I am Qasim (the divider)."  

عَنْ جَابِرٍ قَالَ وُلِدَ لِرَجُلٍ مِنَّا غُلاَمٌ فَسَمَّاهُ الْقَاسِمَ فَقَالَتِ الأَنْصَارُ لاَ نُكَنِّيكَ أَبَا الْقَاسِمِ وَلاَ نُنْعِمُكَ عَيْنًا فَأَتَى النَّبِيَّ ﷺ فَقَالَ لَهُ مَا قَالَتِ الأَنْصَارُ فَقَالَ النَّبِيُّ ﷺ أَحْسَنَتِ الأَنْصَارُ تَسَمُّوا بِاسْمِي وَلاَ تَكْتَنُوا بِكُنْيَتِي فَإِنَّمَا أَنَا قَاسِمٌ  

Ibn al-Hanafiyya was heard to say, "There was an allowance made for 'Ali. He asked, 'Messenger of Allah, if I have a son after you can I name him with your name and use your kunya?' Yes,' he replied."  

سَمِعْتُ ابْنَ الْحَنَفِيَّةِ يَقُولُ كَانَتْ رُخْصَةً لِعَلِيٍّ قَالَ يَا رَسُولَ اللهِ إِنْ وُلِدَ لِي بَعْدَكَ أُسَمِّيهِ بِاسْمِكَ وَأُكَنِّيهِ بِكُنْيَتِكَ؟ قَالَ نَعَمْ  

Abu Hurayra said, "The Messenger of Allah, may Allah bless him and grant him peace, forbade for someone to have both his name and his kunya. He said, 'I am Abu'l-Qasim. Allah gives and I distribute.'"  

عَنْ أَبِي هُرَيْرَةَ قَالَ نَهَى رَسُولُ اللهِ ﷺ أَنْ نَجْمَعَ بَيْنَ اسْمِهِ وَكُنْيَتِهِ وَقَالَ أَنَا أَبُو الْقَاسِمِ وَاللَّهُ يُعْطِي وَأَنَا أَقْسِمُ  

See hadith 837.  

عَنْ أَنَسٍ قَالَ كَانَ النَّبِيُّ ﷺ فِي السُّوقِ فَقَالَ رَجُلٌ يَا أَبَا الْقَاسِمِ فَالْتَفَتَ النَّبِيُّ ﷺ فَقَالَ دَعَوْتُ هَذَا فَقَالَ سَمُّوا بِاسْمِي وَلاَ تُكَنُّوا بِكُنْيَتِي