You can of course download some beautiful fonts and then edit them. But here, I will just suggest regulary few websites for fast and free generation :
First trial :
- emashq.com : Ruqah font available for free
Tag: generate
GenIsNym | Classical Arabic Nickname Generator
This is a simple script. if developed and enriched with a good database can suggest you Islamic and Arabic nicknames based on some simple linguistic patterns like kuniyas.