Ibn al Xu'ffasch (Earth-22)

Ibn al Xu'ffasch is the illegitimate son of Batman and Talia al Ghul. One evening, in her desire to enslave the Batman to her will, she drugged him, and forced herself upon him. The product of their evening together was Ibn al Xu'ffasch. Talia kept Ibn's existence a secret from the Dark Knight, and Batman never learned the truth behind Ibn's parentage.