1. In Arabic if the noun ends with tanveen or if it starts with prefix ‘Al’ it is considered as a definite noun. If this definition is true, both words raufun and raheemun in last verse of Surah Tawbah are used for Prophet Muhammad (ﷺ). Based on this, why can’t one use the same method and simply add a tanveen to his name rather than adding ‘abd’?
2. Kindly quote any verse / hadeeth forbidding the use of names like Abdur rasool (slave of the Prophet)?
- With tanveen it is indefinite. It is definite with ‘Al’.
- We are not slaves of the Prophet (ﷺ); we are his followers.
The great Sahaabi ‘Abd al-Rahmaan ibn ‘Awf said: My name was ‘Abd ‘Amr – or according to one report, ‘Abd al-Ka’bah – and when I became Muslim, the Messenger of Allah called me ‘Abd al-Rahmaan. 
 [Narrated by al-Haakim, 3/306. Al-Dhahabi agreed with him]< Back to Questions