Who is KSI? YouTuber's real name, huge net worth and 'secret girlfriend'

KSI's actual name is Olajide Olayinka Williams Olatunji. He goes by the nickname KSI, which represents knowledge, strength ...
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KSI, from ‘endearing’ class clown to YouTuber who has changed the face of boxing

Before KSI, there was Olajide Olatunji – “JJ” for short. Before the YouTuber, gamer, rapper, boxer, promoter and energy drink magnate, there was the affable class clown in Berkhamsted, Hertfordshire. ...