Abu Wahb, a Companion, reported that the Prophet, may Allah bless him and grant him peace, said, "Name yourselves with the names of the Prophets. The names which Allah Almighty loves most are 'Abdullah and 'Abdu'r-Rahman. The most truthful names are Harith and Humam. The ugliest names are Harb and Murra."  

عَنِ النَّبِيِّ ﷺ قَالَ تَسَمَّوْا بِأَسْمَاءِ الأَنْبِيَاءِ وَأَحَبُّ الأسْمَاءِ إِلَى اللهِ عَزَّ وَجَلَّ عَبْدُ اللهِ وَعَبْدُ الرَّحْمَنِ وَأَصْدَقُهَا حَارِثٌ وَهَمَّامٌ وَأَقْبَحُهَا حَرْبٌ وَمُرَّةُ  

Jabir said, "A man had a child and named him al-Qasim. We said, 'We will not give you the kunya Abu'l-Qasim nor will we so honour you. The Prophet, may Allah bless him and grant him peace, was told and said, 'Call your son 'Abdu'r-Rahman.'"  

عَنْ جَابِرٍ قَالَ وُلِدَ لِرَجُلٍ مِنَّا غُلاَمٌ فَسَمَّاهُ الْقَاسِمَ فَقُلْنَا لاَ نُكَنِّيكَ أَبَا الْقَاسِمِ وَلاَ كَرَامَةَ فَأُخْبِرَ النَّبِيُّ ﷺ فَقَالَ سَمِّ ابْنَكَ عَبْدَ الرَّحْمَنِ