What is KSI's real name?

This image appears in the gallery:
KSI facts: 10 facts you need to know about rapper and boxer

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 

10. 10 images

See the full gallery: KSI facts: 10 facts you need to know about rapper and boxer