Toosiis real name is NauJour Lazier Grainger. He was born on January 9, 2000, in Syracuse, New York, and moved to Raleigh, North Carolina when he was 13 years old. He adopted the stage name Toosii from his childhood nickname "Toota," which his football teammates changed to Toosii as a joke, adding the two Is because "You need two eyes to see the vision".