Question Summary:
Can you call the Prophet Muhammad (sallallahu alahiwasallam) Habibullah?

Question Detail:

 
Can you call the Prophet Muhammad (sallallahu alahiwasallam) Habibullah? Is there proof from sahih hadiths of the name every being used to refer to the Prophet Muhammad (sallallahu alahiwasallam)?

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
The quality of “Habibullah” is established in hadith. Rasulullah salla Allahu ‘alaihi wa sallam said:
ألا وأنا حبيب الله ولا فخر(الترمذي، أبواب المناقب)[1]
Behold! I am “Habibullah” and I do not say this out of pride (Tirmizi)
 
And Allah Ta’āla Knows Best
Hisham Dawood
Student Darul Iftaa
Chicago, USA 
Checked and Approved by,
Mufti Ebrahim Desai.