Answer
The answer to the question "Who else in Jermall's family is also a professional boxer?" is his identical twin brother, Jermell. Both Jermall and Jermell were born on October 8, 1988, and they both started boxing at a young age. They both had successful amateur careers, and they both turned professional in 2009. Jermall has won the IBF middleweight title, and Jermell has won the WBC super welterweight title.