Due to copyright issues and other Artist having King Simba, Simba decided to change his name to Kivu7i which is Swahili for shadow back when Simba was going by Ghozt Blaqq. he wanted something that would resonate with him  coming up as a artist hence the name shadow. also he is a Pisces The light and darkness. and as far as the 7 goes it is numerology number.