The older brother of Michael Jackson cited artistic reasons for the change.
The filing doesn't elaborate, but Jackson's friend Steve Dennis, who was speaking on the singer's behalf, said it's not unheard of for artists to change their names. "Phonetically, it changes nothing," he said.
Jackson has been touring with his brothers in recent months and has been promoting his book about his brother titled, "You Are Not Alone."
A hearing on whether Jackson will become Jacksun is scheduled for Feb. 22 in Los Angeles.
The Associated Press contributed to this report.
