Mateen was born as Omar Mir Seddique in New Hyde Park, New York, to Afghan parents, with his father, Mir Seddique, being a supporter of the Mujahideen.
Mateen was born as Omar Mir Seddique in New Hyde Park, New York, to Afghan parents. His father, Mir Seddique, was a Pashtun who emigrated in the 1980s and was a supporter of the Mujahideen.